For preparing healthy dal dosa, soak yellow lentils, split bengal gram, split black gram and split green gram together in 6 cups of water for 3 hours.
Soak raw rice in another bowl for 3 hours.
Grind the above coarsely with salt, asafoetida, green chillies, red chillies and a little water.
Mix soda powder well in it and keep the batter aside for 1 hour.
Spread a ladle full of the above batter on a hot non-stick pan, and put 1 tsp of oil around it.
Allow it to cook on one side for a few minutes and then turn over to the other side.
Wait till the dosa is cooked and brown on both sides.
Repeat the same procedure till the batter is over.
Healthy dal dosa is ready. Serve hot with chutney.