1 can pork and beans
1 can kidney beans
1 lb. ground beef
1/4 c. onions, chopped
1/2 c. catsup
1/2 c. water
1 tbsp. prepared mustard

Brown hamburger and onions. Drain and add the rest of the ingredients. Pour into casserole dish and bake, 350 degree oven, 35 minutes.