As I mentioned previously, I do recommend blooming your spices if you can as this will help bring out the most flavors in your dish. In the very least, if you do attempt this dish oil free, make sure to at least dry roast your spices to help bring out some of the flavors in the spices. As you are adding some ingredients that might stick to the pan like onions, garlic and ginger, just make sure to deglaze your pan with some vegetable broth to help avoid sticking as you cook.