Put 3 teaspoons oil.

Then put bay leaf, cumin seeds, red chilli,and roast it.

Put the cut onion immediately and then out the ginger garlic paste, the out some salt and turmeric powder which will roast your onion more hastily.

Then put cut tomatoes and put the masalas as per your need !and fry it

Then put milk after the masalas are properly cooked. Then add the milk.

Then take the boiled potatoes and cut it into cubes and pour it in the masalas which you have made.

Let it boil and serve it after 10 minutes of boiling. Bye putting garam masala and coriander leaves after taking it out of the flame.