Rinse sama rice or barnyard millets thoroughly under running water. Transfer sama rice to a bowl and add enough water to soak the rice. Soak for 2 hours.
After the soak cycle is over, drain and transfer it to a food processor.
Add the rest of the ingredients coconut, yogurt, lemon juice, carrots, and spices into the food processor.
Pulse until smooth.
Heat water in a steamer pan. Lightly grease the idli molds.
Just before pouring the idli batter into the molds, add citric acid and ENO to the batter and whisk for 2-3 minutes until combined and frothy.
Spoon the sama rice batter into the greased idli molds.
Transfer the filled molds to the steamer pan, cover with the lid, and steam-cook for 6-7 minutes.
After the cooking time is over, insert the toothpick and check. The toothpick should come out clean.
Carefully remove the hot idli molds from the steamer pan. Allow it to cool for a few minutes. Use the back of the spoon to gently remove the idlis from each mold.
Serve hot with coconut chutney.