Wash and cut the sweet potato into big pieces. Pressure cook for 3-4 whistles.
Once the pressure is settled, peel and mash them very well.
Next heat 2 teaspoons oil in a pan and temper with cumin seeds. Add minced ginger garlic and slit green chilies. Saute well.
Now add chopped onions and saute till they turn soft.
Add grated carrots and saute for 2-3 minutes. Remove from flame and let cool for a while.
Add the sauteed ingredients to the mashed sweet potatoes and mix well.
Next add 3-4 tablespoons bread crumbs or flour to bind. Try shaping a patty, if the mixture is loose add more bread crumbs.
Divide the mixture into 10-12 balls and shape into patties.
Heat oil for deep or shallow frying. While the oil is getting heated make thin slurry of corn flour and water.
Dip the shaped patties in corn flour slurry and roll over remaining bread crumbs. Slide in the hot oil and fry until golden and crispy. Serve hot.