1 lb. ground beef
2 tbsp. chopped onion
salt to taste
1 medium can baked beans
1 medium can kidney beans
1 pkg. frozen Lima beans
1/3 c. catsup
1 tbsp. Worcestershire sauce
1/3 c. brown sugar
1 tbsp. vinegar
1 tbsp. prepared mustard
cheeses

Lightly brown the meat and onion; season with salt. Add beans and remaining ingredients. Simmer 10 to 15 minutes; place in casserole. Cover with cheeses and bake at 350°F for about 1/2 hour.