Wash and soak the lentils (Yellow Moong dal and Toor Dal) for atleast 30 minutes.
Pressure cook the dal, paruppu or lentils until they are mushy. Whisk well and keep aside.
While the dal is pressure cooking, measure and keep the murungai keerai or drumstick leaves aside on to a plate (should be washed and drained well).
For the Kootu gravy, in a mixer grinder jar, add grated coconut, cumin seeds and whole red chillies. Note - I have used byadgi red chillies for the colour.
Grind using 1/2 cup of water into a semi thick paste. Keep aside.
Heat a pan, add coconut oil, urad dal, mustard seeds, chana dal, whole red chillies (broken into two pieces) and curry leaves.
Once the mustard splutters, add the murungai keerai. The leaves will wilt within few seconds.
Add some water (1/2 cup) and turmeric powder, cook this for a couple of minutes.
Once the leaves have cooked, add the pressure cooked and mashed dal along with the coconut gravy.
Mix well and add salt to taste. At this stage, you can add water to achieve desired consistency. If serving for chapati, keep it thick and for rice, you can add a little water.