Bottle gourd gives softness to the dosa. The addition of toor dal gives softness and chana dal gives crispiness to the dosa. You can add 1/2 cup of Idli rice and 1/2 cup of Raw rice to this Sorakkai dosa. Even you can use Kodo millet or little millet instead of rice to make a very healthy dosa.
Check out my Sorakkai adai, sorakkai adai (Lauki paratha recipe) too! Peel the skin and remove the center soft portion of the veggie. Chop them finely. Boil it with little water (just to immerse) and salt and cook till done. Grind the coconut with rice flour and water,to a smooth paste and add it to the cooked veggie.
Check out my simple sorakkai kootu recipe too. Soak rice for 3 hours. Peel the bottle gourd and remove the soft portion in the middle and the seeds. Chop the firm part of the bottle gourd finely. In a mixie, grind red chilli, asafoetida and salt first. Then add rice drained from water and grind smoothly.
Healthy and nutritious multigrain adai dosa which has a addition of bottle gourd added in it. This taste amazing with chutney. Soak all dals and rice together for atleast 4 hours. Drain and grind to a smooth batter. Heat oil in a pan, add seasoning ingredients and add grated bottle gourd and stir fry for 5 mins.