In a Dutch oven, cook the beef, sausage and onion over medium heat until meat is no longer pink; drain. Stir in the tomato paste, garlic salt, oregano and cayenne. Spread over the cut side of each English muffin. Place on baking sheets. Combine the cheeses; sprinkle over meat mixture.
Freeze for up to 3 months or bake at 350° for 15-20 minutes or until heated through. Yield: 3 dozen.