To begin making the Cauliflower Thoran, first heat the oil in a heavy bottomed pan.Add the mustard seeds and once they splutter add the cumin seeds.Add the urad dal and saut� till it just starts turning brown. Add the onions and saut� for a few seconds or till they becomes soft.Add the green chillies, turmeric powder, curry leaves and the cauliflower florets.Sprinkle salt and cook covered till the cauliflower just becomes soft. Add a splash of water if it sticks to the vessel.Add the coconut and mix. Cook for 1 to 2 minutes and take it off the heat.Serve Cauliflower Thoran with�Mixed Vegetable Sambar�and Steamed Rice for a perfect weekday meal.