2In a large bowl, mix together the Cheddar cheese, Parmesan cheese, onion, egg, ketchup, Worcestershire sauce, salt and pepper. Crumble in the ground beef, and mix together by hand. Form into 6 patties, and wrap a slice of bacon around each one. Secure bacon with toothpicks.
3Place patties on the grill, and cook for 5 minutes per side, or until well done. Remove toothpicks before serving on hamburger buns.
Footnotes
Tip
Aluminum foil can be used to keep food moist, cook it evenly, and make clean-up easier.