FIRST STEP - To Make Lentil Crumble or Paruppu Usili
Wash and Soak the 1/4 cup Chana Dal and 1/4 cup Toor Dal separately for an hour.
Drain the water in the colander, give a quick rinse and allow it to sit for 10 minutes until the residual water has also drained out.
Now add both these ingredients in a mixer grinder jar and pulse them once or twice until coarse (do not add any water)
Collect the coarse dal mixture on a greased steamer plate and steam them for atleast 15 minutes.
Once they have steamed, cool completely and pulse them in a mixer grinder. (note - I have written pulse which means just one or two turns of the grinder and not more than that) we are looking for a coarse sand mixture not a wet sticky one). Use immediately and store balance, if any, within the next 48 hours. Store it in a refrigerator.
SECOND STEP - How to make the Vazhaipoo Paruppu Usili
Once the Vazhaipoo is cleaned and chopped, soaked in the buttermilk mixture, we are ready to cook the vegetable.
Drain all the buttermilk water, give it a quick rinse and pressure cook this vegetable (without any water) along with some salt and a pinch of turmeric powder for 2 whistles.
Once the cooker is cooled and pressure released, lid opened. Heat a pan and add oil followed by urad dal, mustard seeds, whole red chillies.
Add some curry leaves and then add in the cooked Banana blossoms. Stir well, check
for salt and add more if required
You will notice some moisture. Allow it to fully evaporate before you add the lentil crumble else it would turn lumpy.
Once water evaporates from the pan, add the lentil crumble, mix well and switch off the flame.
Serve piping hot with Sambar, Rasam or Mor Kuzhambu.