Grind the oats into a fine or slightly coarse powder.
Add oats powder, gram flour, vegetables, cumin seeds, turmeric, and salt to a mixing bowl.
Gradually add water and mix well to make a smooth, pourable batter. Let it rest for 5–10 minutes.
Heat a tawa and lightly grease it with ghee or oil.
Pour a ladleful of batter onto the tawa and spread gently into a small, thick adai.
Drizzle a little ghee or oil around the edges and cook on medium heat until the bottom turns golden and the vegetables are cooked.
Flip carefully and cook the other side until done.
Serve warm with curd, coconut chutney, or a mild vegetable chutney.