Grandma Lois's Baked Beans

Bushes Pork & Beans (big can)
1 tsp. dry mustard
1 med. onion
1/4 c. molasses (liquid)
1/3 c. packed brown sugar
1 Tbsp. vinegar
1/2 lb bacon

*Chop onion & saute in oil or butter until tender & transparent. Mix together with can of pork and beans & all other ingredients. Separately fry bacon, chop and add to mixture. Put mixture into square baking pan. Add a few strips of uncooked bacon to decorate the top. Bake at 300 degrees for 1 1/2 - 2 hours.