Prime Rib Roast with Garlic Herb Crust Ingredients 1 (6–8 pound) prime rib roast, bone-in, tied 6 garlic cloves, minced 1/4 cup fresh rosemary, finely chopped 1/4 cup fresh thyme, finely chopped 2 tablespoons olive oil 1 tablespoon kosher salt 1 teaspoon black pepper 1 tablespoon Dijon mustard