In a saucepan, heat oil, add finely chopped ginger and green chillies. Saute till raw smell of ginger fade away.
Add finely chopped onions and saute till translucent.
Add finely chopped tomatoes.
Cook tomatoes for about 3-4 minutes.
Add spices, red chilli powder, coriander powder and garam masala powder.
Add 1/4th cup of water to prevent spices from burning.
Add soaked green moong dal (green mung beans).
Add 2 cups of water, turmeric powder, salt and sugar.
Cover and cook the moong dal till it softens.
Once cooked, add fresh coriander leaves. Simmer for another 2 minutes.