Peel 100 gram small potatoes and wash them.
Take all small potatoes and required water in a cooker and cook for 2 whistle.
After cooling the cooker, open the lid of cooker and take boiled small potatoes in a plate.
Heat 4 tablespoon oil in a pan.
Add boiled potatoes and fry for 1 minute then transfer this fried potatoes in a plate.
Add 1/4 teaspoon cumin seeds in a same oil.
Add 1 chopped onion and 1 chopped tomato.
Saute it till they becomes soft.
Now add 1/2 teaspoon turmeric powder, 2 teaspoon cumin powder, 1 teaspoon coriander powder and 1/2 teaspoon red chilli powder.
Saute it till oil release.
Now add fried potatoes and mix well.
Add 1/4 teaspoon water and salt as per taste.
Cook it very well.
Serve small potato masala.