Scrub, rinse and peel the potatoes. Chop them roughly into cubes.
Heat a pressure cooker base with 1 tablespoon oil. You can use mustard or any other cooking oil.
Once the oil is well heated, temper with cumin and coriander seeds. Add minced ginger and broken dried chilies. Saute well till the chilies turn dark.
Add the cubed potatoes and saute well.
Add chili powder, turmeric powder and salt to taste. Mix well.
Now add 2 cups water and mix very well.
Close the cooker and pressure cook for 4-5 whistles.
Once the pressure is released, open the cooker and simmer the curry.
As the curry is simmering using a masher or the back of a ladle mash the potatoes as much as you can, They should be mostly mashed with few pieces here and there.
You can keep the curry thin or simmer till it thickens a bit. Once the curry reaches the desired consistency add amchur and garam masala powder.
Mix well, add cilantro leaves and remove from flame. Serve Mathura ke dubki wale aloo warm or hot.