Roast Leg of Lamb with Mint, Garlic, and Lima Bean Purée

Name: Roast Leg of Lamb with Mint, Garlic, and Lima Bean Purée
Yield: Makes 8 Servings
Ingredients: 1/4 cup olive oil; 1/4 cup finely chopped fresh mint; 1/4 cup finely chopped fresh parsley; 1 tablespoon minced fresh rosemary; 2 garlic cloves, minced; 1 5 1/4- pound boneless leg of lamb, butterflied, trimmed of most fat and sinew; Coarse kosher salt; Fresh mint sprigs; Lima Bean Purée