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    Home » Recipes » Holidays

    Keto Oven Roasted Pork Loin with Lemon Herb Sauce

    Published: Jul 31, 2020 · Modified: Jan 8, 2021 by Eileen Murphy Kelly

    Jump to Recipe
    a collage of oven roasted pork loin topped with a lemon herb sauce
    A collage of pork loin drizzled with lemon aioli.

    Are you ready for the most succulent, tender, perfectly seasoned oven roasted pork loin? The meat is luscious and cuts like butter. To take it one step further, the meat is drizzled with an exquisite lemon aioli. The sauce is both herbaceous and tangy. A wonderful addition to a keto, low-carb recipe repertoire.

    You will flip for the aromatic flavors that pop in your mouth with every bite of this sumptuous meal.

    sliced roast pork with a lemon herb sauce

    Keto Oven Roasted Pork Loin Recipe

    My love of pork runs deep. One of the first recipes I shared with you is my Pork Chops and Sauerkraut. It's quite popular and I do hope you try it. Today's recipe has become just as popular recipe with the hubs and me. So rich and tasty. The sauce is ah-mazing.

    The ingredients to make pork loin with lemon herb sauce.

    Main Ingredients

    Pork loin is so easy to cook and can be served for a quick family dinner or an elegant dinner with family and friends.  Use either a marinated lemon-herb pork roast or follow instructions in the recipe to add seasoning.

    Mayonnaise will be the base of the aioli or lemon sauce.  Obviously lemon is a must. Use either fresh or jarred juice. Fresh parley will add a tasty flavor to the pork and the sauce.

    Garlic, my favorite ingredient, which can also be either fresh or jarred.

    Equipment

    As an Amazon Associate I earn from qualifying purchases.

    • Digital Meat Thermometer: A must-have for accuracy.
    • Roasting Pan: We use this one, the rack helps to get a good crust on meat and poultry.

    How to cook a pork loin roast

    This is an overview of the recipe. The full instructions are below in the recipe card.

    Step by step instructions to make roasted pork tenderloin
    1. Preheat oven to 400°F. Place the loin on a roasting pan or baking tray. If not using a marinated pork, make a quick rub of lemon juice, olive oil, minced garlic, and chopped parsley. Rub it on the meat.
    2. Roast the pork until the internal temperature is at least 145°F. This will take about 40-50 minutes.
    3. Make the lemon and herb aioli by combining mayonnaise, lemon juice, minced garlic, parsley, and pepper.

    Recipe Tips and FAQs

    • Pork is naturally keto-friendly and a great protein for a low-carb diet or on a low-sugar diet. 
    • Pork can be salty, therefore, I have not added salt to the seasonings. It is best to taste everything after it has cooked to see if salt is needed.
    • Roast tender cuts of pork at higher temperatures such as 375°F so the meat cooks quickly and stays moist.
    • Do not cover the meat with aluminum foil while cooking so the exterior gets brown and crispy.
    • Use a digital meat thermometer to get an accurate temperature of cooked meat.
    • Let the meat rest for about 10 minutes to allow the juices to set. This ensures a juicy roast, every time.
    • Store leftovers in the fridge, covered, for up to 2 days.

    The accurate temperature of cooked pork as per Pork Checkoff, cook your tenderloin to an internal temperature of at least a temperature of 145°F. On average, the pork will cook  about 20-35 minutes per pound,  depending on your preferred level of doneness, as per the very knowledgable pork.com

    • Rare:                    145°F - 150°F
    • Medium.             150°F  155°F
    • Medium Well    160°F - 165°F
    • Well Done.         160°F

    Variations

    • This recipe is just delicious. For variety, vary the herbs in the aioli. Rosemary, thyme, tarragon, and basil would all be magnificent additions.
    • Pork tenderloin can be used in the recipe in lieu of a roast.  Tenderloin cooks very quickly and should be cooked through in about 25 minutes if using a 1 pound tenderloin. Sliced roasted pork loin topped with an herb lemon sauce.

    Serving Suggestions

    • Roasted Green Beans are absolute favorite side.
    • Lemon Garlic Roasted Asparagus is another quick and easy recipe.
    • Roasted Broccoli, quick and delicious.
    • Mashed Cauliflower, always a favorite.
    • Cauliflower Creamed Spinach, wow this is delish.

    Similar Recipes

    • Pork Chops and Sauerkraut, one of my first recipes and a crowd favorite.
    • Mexican Grilled Pork Chops, quick and tasty.
    • Low-Carb Chicken Piccata, lemony, and loaded with flavor.
    • Foil Wrapped Salmon with Lemon and Herbs, under 30 minutes for an outstanding meal.
    • Keto Jambalaya, Super-fast and flavorsome.

    Roasted sliced pork topped with a smooth lemon aioli.

    This post contains affiliate links for your convenience. We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com

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    Love this recipe, it would be awesome if you give it a 5-star rating and share comments below.

    📖 Recipe

    sliced roast pork with a lemon herb sauce

    Keto Oven Roasted Pork Loin with a Lemon Aioli

    Keto Oven Roasted Pork Loin with a lemon herb aioli is a succulent, tender, perfectly seasoned pork loin roast. The sauce is both herbaceous and tangy. A meal ready in about 50 minutes, perfect for weeknights and entertaining company.
    5 from 11 votes
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    Course: Main Course
    Cuisine: American
    Keyword: keto pork loin, oven roasted pork loin, roasted pork tenderloin
    Prep Time: 5 minutes minutes
    Cook Time: 50 minutes minutes
    rest time: 5 minutes minutes
    Total Time: 1 hour hour
    Servings: 6 servings
    Calories: 450kcal
    Author: Eileen Kelly

    As an Amazon Associate, I earn from qualifying purchases

    Equipment Needed:

    • As an Amazon Associate I earn from qualifying purchases
    • 10" x 7" Roasting Pan with Rack
    • Instant Read Thermometer
    • Measuring Spoons and Cups
    • Stainless Steel Mixing Bowls
    • Pastry Brush
    • Whisk

    Ingredients

    • 3 pounds boneless pork loin roast Note 1
    • 1 Tablespoon olive oil
    • 1 teaspoon lemon juice
    • 1 teaspoon fresh parsley
    • ½ teaspoon minced garlic
    • ground black pepper, to taste

    Herb Lemon Aioli

    • ½ cup mayonnaise
    • 2 Tablespoons lemon juice
    • 1 teaspoon minced garlic
    • 2 Tablespoons fresh parsley
    • ground black pepper, to taste

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    Instructions

    • Preheat the oven to 375°F.
    • In a small bowl whisk together olive oil, lemon juice, parsley, garlic, and black pepper. Use a pastry brush to brush the mixture onto the pork loin.
    • Place the seasoned pork in the roasting pan. Preferable on a roasting pan with a rack so the entire pork develops a nice brown crust.
    • Roast the pork, about 20 minutes per pound, for 1 hour and 10 minutes. The internal temperature of the pork must be at least 145°F. See Note 1, below.
    • Once the meat has cooked, the interior of the meat will be slightly pink. remove from the oven. Lest rest 5 minutes before slicing.
    • Serve, drizzled with the lemon aioli.

    Herb Lemon Aioli

    • While meat cooks, make the aioli.
    • In a medium bowl, whisk together mayonnaise, lemon juice, minced garlic, fresh parsley, and black pepper. Refrigerate until ready to serve over pork roast.

    NOTES

    Note 1: The recipe is using a boneless pork loin, not a tenderloin. Use the cooking guide of 20-25 minutes per pound. Also the temperature guide to your preferred doneness:
    • Rare:                    145°F - 150°F
    • Medium.             150°F  155°F
    • Medium Well    160°F - 165°F
    • Well Done.         160°F
    Note 2: Pork can be salty, therefore, I do not add salt to the seasonings. It is best to taste everything after it has cooked to see if salt is needed.
    Note 3: Roast tender cuts of pork at higher temperatures such as 375°F so the meat cooks quickly and stays moist.
    Note 4: Do not cover the meat with aluminum foil while cooking so the exterior gets brown and crispy.
    Note 5: Use a digital meat thermometer to get an accurate temperature of cooked meat.
    Note 6: Let the meat rest for about 10 minutes to allow the juices to set. This ensures a juicy roast, every time. 
    Note 7: Store leftovers in the fridge, covered, for up to 2 days
    Any nutritional data I provide is an approximation and actual dietary information can vary based on ingredients and proportion sizes.

    Nutrition

    Serving: 1serving | Calories: 450kcal | Carbohydrates: 1g | Protein: 51g | Fat: 26g | Saturated Fat: 5g | Cholesterol: 151mg | Sodium: 231mg | Potassium: 856mg | Fiber: 1g | Sugar: 1g | Vitamin A: 124IU | Vitamin C: 4mg | Calcium: 13mg | Iron: 1mg
    Tried this recipe?Mention @Everyday_Eileen or tag #everydayeileen!

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    Thank you for sharing!

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    1. Renee

      December 14, 2024 at 2:07 pm

      5 stars
      So delicious and tender and easy to make. Even my husband who doesn't like mayo loved it. Will be adding to my go to for Keto/ low carb dinner recipes.

      Reply
      • Eileen Murphy Kelly

        December 26, 2024 at 2:46 pm

        Fabulous, Renee. I am thrilled the recipe worked for you and your husband.

        Reply
    2. Jacque

      August 10, 2020 at 11:37 am

      5 stars
      Elegant to serve at a dinner party or easy enough to make during the weekend. This dinner recipe is eight up my alley.

      Reply
      • Eileen xo

        August 10, 2020 at 11:44 pm

        Wonderful Jacque, so glad you enjoyed the recipe.

        Reply
    3. Gunjan

      August 10, 2020 at 12:32 am

      5 stars
      My brother made this recipe for everybody and we all loved every bit of it. Thanks for sharing.

      Reply
      • Eileen xo

        August 10, 2020 at 11:45 pm

        Excellent Gunjan. I am so glad you all enjoyed the recipe.

        Reply
    4. Laura

      August 09, 2020 at 4:54 pm

      5 stars
      Great recipe for an easy but delicious meal! Ill have to give it a try when my parents come over, I think they will love it!

      Reply
      • Eileen xo

        August 10, 2020 at 12:07 am

        Wonderful, Laura,so glad you enjoy the pork recipe.I hope your parents enjoy it too

        Reply
    5. Anna

      August 09, 2020 at 5:42 am

      5 stars
      We've tried this recipe last night for a small family gathering for my husband's birthday. It was a hit! Everyone loved it and asked for the recipe too! Thank you for sharing, it will definitely be our go-to!

      Reply
      • Eileen xo

        August 10, 2020 at 11:46 pm

        Fabulous Anna. I am so happy you made this for your husbands birthday and everyone enjoyed it

        Reply
    6. Sharon

      August 08, 2020 at 10:45 am

      5 stars
      With this recipe, I can have the Sunday roast covered in sauce that I love without the guilt.

      Reply
      • Eileen xo

        August 10, 2020 at 12:08 am

        Absolutely, Sharon, enjoy the pork and the sauce. They are delicious.

        Reply
    7. Candice

      August 05, 2020 at 1:19 pm

      5 stars
      Such a flavorful recipe! It is easy, uses simple ingredients, and is just perfect for everything from weeknights to dinner parties. Thank you for the great recipe!

      Reply
      • Eileen xo

        August 07, 2020 at 11:32 pm

        Thank you, Candice. Glad you like this roasted pork .

        Reply
    8. Aditi Bahl

      August 05, 2020 at 3:55 am

      5 stars
      Loved the recipe. I will try this recipe. Looks amazing.Thanks for sharing.

      Reply
      • Eileen xo

        August 05, 2020 at 9:59 am

        Excellent, enjoy the pork

        Reply
    9. Bernice Hill

      August 04, 2020 at 3:31 pm

      5 stars
      I'm kind of drooling over here. I love a nice roasted pork loin and adding the aioli to it for dipping is a nice touch.

      Reply
      • Eileen xo

        August 05, 2020 at 10:00 am

        I hope you enjoy the pork and the aioli is delish.

        Reply
      • Kushigalu

        August 08, 2020 at 11:30 am

        5 stars
        Love pork loin but this sauce looks fantastic. What a flavorful combo. I would love to try this out soon.

        Reply
        • Eileen xo

          August 10, 2020 at 12:07 am

          Awesome Kushigalu, enjoy the pork.

          Reply
      • Loreto Nardelli

        August 09, 2020 at 10:24 pm

        5 stars
        What a wonderful and easy recipe. I adore pork loin and if cooked just right melts in your mouth! Yours looks spot on and live that crust on the surface! The aioli is a nice touch to finish things off. Well done!

        Reply
        • Eileen xo

          August 10, 2020 at 11:46 pm

          I am thriled that you enjoy the pork loin Loreto.

          Reply

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