Take a pan. Heat 2 Teaspoons oil.
Add cumin seeds, chopped ginger and garlic. Saute for a minute.
Then add raw spinach leaves. Cook it for 5 minutes on medium flame. You have to dry out all the juices. Then remove this from the pan and cool it. If you want to add green vegetables, cook them for 4-5 minutes with pinch of salt before adding the spinach.
Now take a bowl. Add boiled and grated potato, cooked spinach, coriander leaves, green chilies, chaat masala,roasted cumin & coriander powder, salt and cornflour. Mix the entire thing very well with your hand. Check the seasoning and adjust it according to your taste.
After that heat 3-4 inches of vegetable oil in a kadai / pan.
Take small portion of the mixture in your hand and give patty like (any) shape of your choice.
Put those kababs into the hot oil and fry for 5-6 minutes on medium flame by flipping the sides.
Then take them out in a tissue paper.