Easy Baked Beans

1. Fill a 4-qt. casserole dish with canned pork and beans.
2. Add:
   • 2 tbs. brown sugar
   • 1 tbs. vinegar
   • 1 tsp. mustard
   • ½ c. chopped onion
3. Bake uncovered at 350 for 1 to 1½ hrs.