Ora's Cowboy Chili

1 lb. ground beef
2 cups chopped onions
2 (16 oz) cans Pork & beans (undrained)
1 (15 oz.) can Light Red Kidney beans, drained and rinsed
1 cup ketchup
2 tbsp. yellow Mustard
2 teaspoons cider vinegar
1 tsp. slat
Combine beef and onions and cook until brown. Combine beef mixture and remaining ingredients, stirring carefully but well. Spoon into 2 - qt. casserole dish and bake for 30-40 minutes at 400* (or put in crockpot and bake until bubbly, can be left on low for 3-4 hours).