To prepare sambar masala
Heat 2 teaspoons oil in a small pan. Add all the ingredients expect coconut and saute for 2-3 minutes.
Add grated coconut and saute for few seconds.
Grind to a smooth paste.
To make sambar sadham
Heat a pressure cooker base with 1 tablespoon ghee.
temper with mustard seeds, cumin seeds and curry leaves.
Add pearl onions and saute for few minutes.
Add the cubed vegetables and saute well.
Add the prepared sambar masala and mix well. Cook for 3-4 minutes.
Add the rinsed rice, dal and mix well. Season with salt. Add 4-5 cups water. Mix well and pressure cook for 6-7 whistles.
Once the pressure is released, mix well and top with more ghee if needed. Serve sambar rice immediately