1. Preheat oven to 350F. Roast lamb 2 hours or until 120 degrees.
2. Once cooked, char on a grill or in a large skillet until caramelized or until lamb is 140 degrees. Slice and serve with Chimichurri.
1. To prepare Chimichurri, combine parsley, mint, basil, shallot, and fresh garlic in a food processor. Pulse until chopped. Add sherry vinegar and olive oil and process until emulsified. Season with salt and pepper.