Add ½ cup moong dal in a vessel and wash it well.
Add ¾ cup water, green chili, ginger and turmeric powder.
Pressure cook for 3-4 whistles and keep it aside.
Add 3 tsp oil in a pan and add mustard seeds.
Once they start to crackle add asafoetida and curry leaves.
Add 1 finely chopped tomato and saute for a minute
Add ½ potato cut into small cubes. You can add carrots also instead of potato.
Mix well
Add the sambar powder, turmeric powder and salt.
Mix well and add 1 cup of water
Let this boil.
Allow the potato to cook, and let it become soft. This will get cooked in 8-10 minutes.
Now add the cooked dal to this.
Add water to adjust the consistency.
Mix well and boil for 2 minutes.
Switch off.
Garnish with coriander leaves.
Add 2 tsp lemon juice now and mix well.
Serve with hot chapathi