Three Bean Casserole

1 pound ground beef
1/2 pound bacon, diced
1 onion, diced
1/2 cup ketchup
1 teaspoon mustard
1/2 teaspoon salt
1/4 teaspoon pepper
3/4 cup brown sugar
2 teaspoons vinegar
1 (15 ounces) can pork and beans
1 (15 ounces) can lima beans
1 (15 ounces) can kidney beans

Brown hamburger, bacon and onion and drain the fat off. Add the rest of the ingredients and bake for 40 to 45 minutes at 350 degrees.