Mix chickpea flour with a little bit of water at a time, until you have a thick batter. Add salt and garlic powder.
Put a skillet over a low heat and heat oil. Drop ½ teaspoon of batter at a time into the oil.
When it turns golden brown, it is done and with a strainer pick up the besan and put it on a dry pan, cut potatoes in a small piece and put them in a bowl.
Chop onion up and sauté with 1 tablespoon of leftover oil. Add coriander, cumin, turmeric and mustard powders.
Add potatoes and mix thoroughly. Add ¼ cup of water. Cut ginger into very small pieces and add to the curry.
While the curry is cooking, cut the tomato and add to the pan. Put cover on. When potato feels soft, add fried besan to the curry. Add salt.
The time you drop the potato in the pan to the time you drop the fried besan into the pan should not be more than 15 minutes. Serve warm as a side dish.
