Here's one that we love:
Four Bean Casserole
1 can lima beans
1 can kidney beans
1 can pork and beans
1 can butter beans
1 lb bacon
4 large onions
1/3 C vinegar
3/4 C brown sugar
1 T dry mustard
Cook together bacon, onions, vinegar, brown sugar and mustard. Simmer 20 mins. Add all beans. Bake in large casserole dish for 2 hours @ 325. Serves 10-12