Roast Leg of Lamb with Mint Pesto
Updated Oct 20, 2022, Published Mar 01, 2016
This post contains affiliate links. Please see our disclosure policy.
Roasted lamb is the perfect St. Patrick’s day meal, and even more traditional then corned beef and cabbage!

Roast Leg of Lamb with Mint Pesto
Ingredients
- 1 5- to 6-pound boneless leg of lamb
- ½ cup plus 1 tablespoon extra-virgin olive oil, divided use
- Kosher or fine sea salt
- Freshly ground black pepper
- 6 garlic cloves, peeled and chopped
- 2 cups fresh mint leaves, packed
- 2 cups fresh basil leaves, packed
- ½ cup roasted and salted pistachios
- Zest and juice of 1 medium lemon
Instructions
- Let lamb sit at room temperature for about 30 minutes. Preheat oven to 450ºF.
- If the lamb comes in netting, leave it on. If not, tie the roast in several places so it keeps its shape (or better yet, have your butcher do it). Rub with 1 tablespoon olive oil and season generously on all sides with salt and pepper. Roast the leg of lamb for 15 minutes. Reduce the oven temperature to 350ºF, then continue to roast for another 60-90 minutes or until the internal temperature reads 135ºF (for medium rare) on an instant-read thermometer. Remove from the oven, cover with foil, and let sit for 20-30 minutes before slicing.
- In a food processor fitted with the steel blade or in a blender, combine the garlic cloves, mint, basil, pistachios, lemon juice and zest, ½ teaspoon salt, and ¼ teaspoon pepper. Blend to combine. With the machine running, add ½ cup olive oil and blend until smooth. Taste and add more salt and pepper if needed.
- Spoon a little of the pesto on top of the lamb and serve the rest on the side.
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.
The views and opinions expressed on this blog are purely the blog owner’s. This blog accepts free manufacturers samples and forms of cash advertising, sponsorship, paid insertions or other forms of compensation. Affiliate links may be included in this post.