Add onion, carrot, bell pepper, garlic, rosemary, turkey, salt and pepper. Stir to combine. Divide mixture evenly among muffin cups (about 1/3 cup each). Top each with 1 tablespoon pasta sauce and 1 slice pancetta, formed into a round to cover. Placed pan on rack below muffin pan to catch any drippings. Bake 18 to 22 minutes or until thermometer inserted in center of loaf reads at least 165°F. Let stand 5 minutes.