The best way to fix undercooked potatoes is to allow them to cook using the same method as used before they came out undercooked. For example, to fix undercooked boiled potatoes, just boil them for an additional 10 minutes at 212°F or at a rolling boil.
What happens if you eat slightly raw potato?
Though attempting to digest raw starches isn't going to cause you any lasting bodily harm, the raw potato will pass through the digestive tract with very little breakdown, likely leading to an increase in unpleasant cramping, bloating, and gas production.
Is it OK to eat undercooked potato?
You shouldn't eat undercooked potatoes. When too raw, potatoes contain an alkaloidal compound often found to be uncomfortable or even outright harmful to the human digestive system.
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