Place the sweet potato in water for 10 minutes. Rinse the sweet potato under running water, spread them on a paper towel and pat to dry. Remove all the moisture
In a bowl add sweet potato, corn flour, salt, pepper powder and oil; give a gentle mix
Preheat the oven to 425 degree Fahrenheit and Grease the non- stick cookie tray with cooking spray
Spread sweet potato in such a way that there is no overlap on parchment paper. Bake them for about 10 - 14 minutes, carefully turn and bake for another 10 - 14 minutes until they crisp. Turn off the oven and after 5 minutes keep the fries again in oven for 3-5 minutes or till you enjoy:-)