Cathy J's Baked Bean Casserole

Name: Cathy J's Baked Bean Casserole
Prep time: 15 min
Cook time: 1 h
Total time: 1 h 15 min
Yield: 3 qt casserole dish
Ingredients: 1 can pork & beans; 1 can dark kidney bean, drained; 1 can butter beans, drained; 1/2 lb ground beef, browned (or more); 1/2 lb bacon, browned (or more); 1 large onion, sauteed; 1/2 cup white sugar; 1/2 cup brown sugar; 1/4 cup ketchup; 1 tablespoon yellow mustard