In a mixing bowl, combine ragi flour, rice flour, salt, cumin seeds, curd, and water.
Whisk thoroughly to make a thin, lump-free batter similar to rava dosa batter consistency.
Mix in chopped onion, green chilli, coriander, and optional vegetables.
Allow the batter to rest for 10 minutes for improved texture.
Heat a non-stick tawa or cast-iron pan until medium hot.
Pour batter from a height in circular motion to create thin crispy dosas.
Drizzle a few drops of oil and cook until edges become crisp and golden brown.
Serve hot with coconut chutney, tomato chutney, or sambar.