To make these burgers freezer friendly....prepare the hamburgers with the teriyaki sauce and freeze. Then pull them out when needed and proceed with the bbq'ing and makings!

8 pineapple slices

3/4 cup teriyaki sauce

1 pound lean ground beef

1 large sweet onion, sliced

1 tbsp. butter or margarine

4 lettuce leaves

4 onion or sesame seed buns, split and toasted

4 slices Swiss cheese

4 bacon strips, cooked

Drain pineapple juice into a small bowl; add teriyaki sauce.  Place 3 tbsp. in a resealable plastic bag.  Add pineapple and rotate to coat; set aside. Shape beef into four patties; place in an 8-inch square baking pan.  Pour the remaining teriyaki sauce mixture over patties.  Marinate for 5 to 10 minutes, turning once. In a skillet, saute onion in butter until tender, about 5 minutes.  Grill or broil burgers until no longer pink. Place pineapple on grill or under broiler to heat through.Layer lettuce and onion on bottom of buns.  Top with burgers, cheese, pineapple and bacon.  Replace tops; serve immediately.