Roast the sooji and set aside. I used roasted sooji from the market, so I skipped the first step. Make sure its not brown in color, just slightly where it will still have the same color.
In a kadhai or skillet, heat the oil. Add mustard seeds, urad dal, curry leaves, red chilli. Let it splutter and then add chopped onions and green chilies. Saute for a few mins until the onions are pink. Add the veggies and roast for a few minutes. Once they are cooked a little bit not all the way, add salt, red chili powder and water. Taste test the water for salt. If needed add it at this time.
Let the water come to a boil and add sooji to it and mix it all together while adding the water. If you think it is still on the drier side, then you can add a little more water and cover it for 3-4 minutes. You can add the fried/roasted cashew at this time or you can garnish it when serving.
Your delicious Rava Upma is ready to be served. Serve it hot. Enjoy it with a cup of ginger tea.