best meatloaf recipes around, including recipes for turkey meatloaf from the experts at Food Network.food processor bowl, combine croutons, black pepper, cayenne pepper, chili powder, and thyme. Pulse until the mixture is of a fine texture. Place this mixture into a large bowl. Combine the onion, carrot, garlic, and red pepper in the food processor bowl. Pulse until the mixture is finely chopped, but not pureed. Combine the vegetable mixture, ground sirloin, and ground chuck with the bread crumb mixture.