Best Easy Lamb Leg Roast with Rosemary Recipe

A fragrant lamb leg roast studded with rosemary and garlic is a high protein, Mediterranean-inspired family holiday classic. This tender, flavorful roast makes an elegant centerpiece.

Cook 150 min Difficulty NORMAL 320 kcal
#mediterranean #high protein
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Ingredients
Main ingredients
  • bone-in lamb leg 5 lbs
  • fresh rosemary sprigs 6 pieces
  • garlic cloves 8 cloves
Seasonings/Sauce
  • olive oil 3 tbsp
  • kosher salt 2 tsp
  • black pepper 1 tsp
Nutrition summary
Carbohydrates 2 g 2%
Protein 32 g 40%
Fat 20 g 58%
Serving size 180g
Cooking steps
  1. 1

    Preheat the oven to 350°F (175°C). Pat the lamb leg dry and let it sit at room temperature for 30 minutes to ensure even roasting.

  2. 2

    Using a sharp paring knife, cut 16 small slits evenly around the lamb. Insert a half garlic clove and a small rosemary sprig into each slit for even flavor infusion.

  3. 3

    Rub the entire surface of the lamb leg with olive oil, then season generously with kosher salt and black pepper.

  4. 4

    Place the lamb on a rack in a roasting pan. Roast uncovered in the center of the oven for about 1 hour 45 minutes to 2 hours (20 minutes per pound), until a meat thermometer inserted into the thickest part registers 135°F for medium-rare.

  5. 5

    Remove the roast from the oven, tent with foil, and rest for 20-30 minutes before slicing to lock in juices.

Personalized Q&A
Q. What's the key ingredient in this lamb leg roast recipe?
The bone-in lamb leg is the star ingredient, providing a rich, savory flavor profile and tender texture. Fresh rosemary and garlic also play crucial roles in defining the classic Mediterranean character of this roast.
Q. Which cooking step is most important for a juicy roast?
Resting the lamb leg under foil for 20 to 30 minutes after roasting allows the juices to redistribute, ensuring each slice is moist and tender. Skipping this step can lead to dry meat.
Q. How can I prevent the lamb from drying out?
Letting the lamb sit at room temperature before roasting, using olive oil for moisture, and not overcooking (aim for 135°F for medium-rare) will help maintain juiciness and avoid tough texture.
Q. What are the nutrition facts per serving for this recipe?
Each 180g serving contains roughly 320 kcal, 32g protein (40% of calories), 20g fat (58% of calories), and only 2g carbohydrates (2% of calories), making it a high-protein, low-carb option.
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