Instant South Indian Rolled Oats Dosa Recipe

1 cup rolled oats
   1 cup rice flour
   ¼ cup rava, coarse
   1 tsp salt
   4 cups water
   ½ onion, finely chopped
   2 chilli, finely chopped
   2 tbsp coriander, finely chopped
   2 tbsp curry leaves, chopped
   1 tsp cumin