Spam and Beans

2 - 16 oz cans beans
¼ cup ketchup
¼ cup chopped onion
¼ cup brown sugar
1 Tbsp prepared mustard
1 - 12 oz can Spam

Combine beans, ketchup, onion, brown sugar and mustard. Place in 10x6 baking dish. Place spam slices, slightly overlapping down the center of the beans. Bake at 350 for 30 minutes.