Raw Sweet Potato
Preheat oven to 250°F.
Wash the sweet potato or yam (the very orange type).
Cut down the middle lengthwise. Then cut long lengthwise slices about 1/3 of an inch wide and place on a cookie sheet in a single layer.
Bake in the oven at 250 F for about 3 hours. This leaves them kind of chewy but you could also bake them a little longer to get them crunchy.