Gobi Manchurian/cauliflower Manchurian

cauliflower/Gobi-1 medium sized  All-purpose flour/maida-2 tbsp cornflour-2 tbsp ginger-garlic-1 tbsp green chilly paste-1 tsp warm water-1/2 cup approx. salt to taste For gravy: Corn flour-1tbsp Onion-1/4 cup(finely chopped) spring onions-1tbsp(finely chopped) capsicum..