1 lg. can (48 oz.) pork & beans
1 sm. can (20 oz.) crushed pineapple
2-3 tbsp. catsup or barbecue sauce
1 tsp. prepared mustard
1/4 c. maple syrup
1/4 c. chopped onion, or more
Bacon bits on top if desired

Mix well. Spread in 9 x 13 pan. Bake at 350 degrees until bubbly.