Steam potatoes in a pressure cooker or boil them in water. Cut them lengthwise.
Wash mint and coriander leaves (cilantro).
In a kadhai/saucepan heat a tablespoon of oil. Once hot, add roughly chopped green chillies and roughly chopped onions.
Saute onions for about 5 minutes till they turn translucent.
Add washed mint and coriander leaves. Cook for 3-4 minutes on low to medium flame.
Cool this mixture and blend it to a coarse paste using some water. (actually, I ended up adding less than 1/4th cup of water).
Our Chutney paste is ready.
Heat oil in a kadai or nonstick pan, add mustard seeds and let them crackle.
Add cumin seeds and white sesame seeds (til). Saute for 15-30 second on low flame. Add hing (asafoetida).
Add roughly crushed ginger-garlic paste. Saute paste till the raw smell fades away.
Saute till the ginger-garlic paste turns golden brown. Add the boiled potatoes.
Add coriander powder, salt and half a teaspoon of sugar (optional). Mix all the ingredients.
Add the chutney paste and mix it with potatoes.
Add turmeric powder and mix. Cover and let the potatoes steam for about 4-5 minutes.
Chutney Potatoes are ready. Sprinkle lemon juice when serving.