Tender Leg of Lamb Roast with Flavorful Mint Pesto

Name: Tender Leg of Lamb Roast with Flavorful Mint Pesto
Ingredients: 1.7 – 2kg (3.7 to 4.4 pounds) leg of lamb, bone in; salt and black pepper to season; fresh sprigs of thyme and rosemary; one large sweet potato, cut in rings; 1 cup pearl onions, peeled; 2 whole cloves of garlic, tops removed; 4 tablespoons butter; 2 cups baby carrots; 4 tablespoons butter to saute caulirice; 1 large head of cauliflower, grated; salt and black pepper to season caulirice; a handful of fresh mint; ¼ cup chopped almonds; 1 garlic clove; ¼ cup grated parmesan; ½ cup olive oil; salt and black pepper to season pesto