In a mixing bowl, add sooji, 1 cup water and yogurt. Mix thoroughly to form a smooth batter. Keep aside for 20-30 minutes. Meanwhile, you can prep the vegetables if not already prepped.
After 20-30 minutes, to the same bowl, add grated carrots, chopped methi, chopped curry leaves, sesame seeds, salt, coriander powder, chaat masala and red chili powder. Mix everything together.
Add 1/4th cup of water to the mixture (You can add more water if you want thinner consistency, or less water for thicker batter). Mix again.
Optionally, add baking soda (you can add this just before you are ready to make the rava cheelas). Give it a final mix, and your instant rava uttapam batter is ready.
With a little oil, grease a non-stick pan or tawa kept on a low-medium heat. Pour 1/4 cup of batter, and smoothen it with the back of a spoon to form a circle.
Sprinkle very little oil, and let it cook on one side. Then flip and cook the other side. Continue to cook both sides till the cheela is fully done. Repeat the same for all the cheelas.
Serve with your favorite dip or chutney.