1 pound lean ground beef
2 tablespoons ketchup
1/4 teaspoon salt
1/4 teaspoon pepper
1 (7 1/2-ounce) package party rolls
5 (3/4-ounce) process American cheese slices, quartered
Condiments: mustard, ketchup, mayonnaise, minced onion, dill pickle slices, tomato slices, lettuce leaves

Combine first 4 ingredients. Shape mixture by tablespoonfuls into patties, and place on a rack in a broiler pan.

Bake at 350° for 15 to 17 minutes or until done.

Split rolls horizontally, and place a piece of cheese and a meat patty in each. Serve with desired condiments.

Note: Place in heavy-duty zip-top plastic bags; seal and freeze. Remove desired number of burgers from freezer; pack frozen in lunchbox. Sandwiches will thaw in approximately 2 1/2 to 3 hours.