Make tamarind water (2 cups) with the tamarind and set it aside. In the pressure cooker, cook the dal, rice, chopped vegetables, peanuts, mochai and turmeric powder with enough water so that it cooks well. I used 5 cups of water for this quantity. In a large pot add two tbsp of ghee, pop the mustard seeds, khas khas and asafoetida. Next, add the curry leaves and onions. Fry till translucent and then add the tamarind water. Add salt and allow tamarind water to cook until the smell of raw tamarind is gone. Some people add some jaggery also so that the bisibela has a somewhat sweetish taste. However, my mother never did and I follow her recipe. Mash the vegetables and rice well and add it to the pot, stirring well. Add the dry masala powder and remaining ghee to taste and mix well. Serve hot with appalam/vadam, roast potatoes and a pachadi. Serves 6.