Clean and wash cauliflower florets and cut into small florets. Take cauliflower in a mixing bowl, add rice flour, all purpose flour, chilli powder and salt. Mix well by adding little water. Keep aside for 5mins.
Heat oil in a deep vessel or kadai. When the oil is hot enough, drop the cauliflower floret one by one into the oil. Fry cauliflower florets on medium flame till they turns golden.
When all the florets turns golden, transfer them into the plate. You can also drain them on the kitchen towel to remove excess of oil if any.
Heat oil in a frying pan.
Add finely chopped onions, green chillies and pinch of salt. Saute them for 1-2mins.
Add chopped ginger and garlic. Saute them for 2-3 mins.
When the onions are translucent, add capsicum and fry till capsicum is cooked.
Add hot sauce, mix well and fry for 1-2 mins.
When the sauce is nicely mixed and raw smell goes off reduce the flame.
Add fried cauliflower florets and mix well.
Gobi Manchurian is ready. Serve hot.