1 large can pork and beans
1 medium onion
3 strips bacon
1/2 c. brown sugar
1/2 c. ketchup
1/2 c. dark Karo syrup
1 to 2 tsp. mustard

Brown bacon and saut onions in bacon grease. Add other ingredients to skillet, making a sauce. Pour over beans.

Bake at 350°F for 30 to 45 minutes.