Whisk 1 egg, salt and red chilli powder (to taste) in a bowl and keep ready.
Heat a non stick frying pan in low flame and spread a tsp of oil.
Add ladle of dosa batter and spread evenly.
Pour the egg mix and immediately add onions, tomatoes, and capsicums on top.
Sprinkle chaat masala and close a lid.
Cook in low flame for 2 to 3 minutes.
Open and check if the dosa is cooked on the lower side.
Turn it to the other side and cook for about 2 minutes. Once the eggs are cooked and the capsicums and tomatoes have turned slightly soft, turn over the dosa and serve. In the same way make the remaining 3 dosas. Serve hot with tomato ketchup.
