At first take 1 cup moong dal in a cooker and fry for 2 minutes.
After that add required water and cover the cooker with lid.
Cook it for 4 whistles.
Let be cool and open the lid.
Heat 2 tablespoon oil in a pan.
Add 1/2 teaspoon cumin seeds and let be splutter.
Now add 1 chopped onion and 2 chopped tomato.
Saute them till they becomes soft.
After that add 1 tablespoon turmeric powder and 1 teaspoon red chilli powder.
Saute it for 30 seconds.
After that pour cooked moong dal.
Add salt as per taste.
Boil for 6 to 8 minutes.
Serve tomato moong dal.