Cook bacon until crisp. Remove bacon and discard all but 2 tablespoonsdrippings. Saute, onion in drippings until tender.

Crumble bacon: add with mushrooms to skillet and set aside. Meanwhile, combine beef, pork, cheese, pepper, garlic powder and steak sauce in a large bowl.

Shape into 16 patties.

Divide bacon mixture and place over eight of thepatties.

Place remaining patties on top and press edges tightly to seal.

Grill over medium coals until well-done (pork sausage in burgers requires thorough cooking). Serve on buns; with lettuce if desired