Boil Toor dal with salt and turmeric. Heat some oil. Add mustard seeds (let splutter), cumin seeds, curry leaves, slit green chilli, hing, chopped red onion, fresh ginger and garlic paste. Let the onions brown well. Then add red chilli powder, turmeric, a bit of dhania powder, amchur, finely chopped tomatoes and salt. Let the tomatoes cook well (almost mashed). Then add this to the dal and serve garnished with fresh cilantro.