Soak your potato rounds in cold water for at least a half hour. Dry well. Fry at 300 for 7 minutes or so until very lightly browned and cooked through. drain on rack. Fry at 400 degrees for about 2 minutes until golden and crispy. Sweet potatoes will be quicker.

The sauce was just caramelized onions mixed with ketchup and a little mustard. Cook up some mini burgers with cheese and sandwich between the potatoes with some of the sauce.