German Potato Salad

4 potatoes (peeled, cooked whole, sliced 1/4 in. thick when cool)
3 onions (sliced)
1 12 oz. package of bacon

Dice and fry the bacon. Reserve bacon grease, then add:

1 cup water
1/2 cup vinegar
1 cup brown sugar
3 tablespoons corn starch
Salt and pepper (to taste)

Boil the previous mixture until thick. Layer potatoes, onion, and bacon in dish, and pour sauce over this. Bake at 350 degrees for 1 hour covered (Uncover last 15 minutes or so).