Boil potatoes, peel or cut into small cubes as the case may be.
Roughly pound fenugreek seeds, cumin seeds, kala jeera and fennel seeds.
Mix the above with little salt and apply it to the potatoes and keep for 1/2 hour.
Heat oil in a pan or a kadai.
Fry curry leaves.
Add the rest of the pounded masala and fry on a low flame for 2 mins.
Add potatoes, hung curds and green chillies.
Cover and cook, till the dish is dry.
Add amchoor and stir well.
Remove from the flame.
Garnish with fresh coriander leaves.
:- Serve hot.