Soak Chana overnight.
Add Chana, water, turmeric powder, salt, and green chilies; boil.
Add beetroot and pressure cook for 4 whistles.
Drain the water and set it aside. You can use this for rasam or other cooking purposes.
Pulse coconut, small onions, tamarind, mustard seeds, and cumin seeds into a paste.
Heat oil and temper mustard seeds, urad dal, and curry leaves.
Add the ground mixture and salt; sauté until the raw smell disappears and the coconut dries up.
Add the cooked Chana and beetroot; sauté for a minute.
Lower the flame, cover it, and let it rest for 2 minutes. Keep it covered until ready to serve.