Here`s a dosa made differently by replacing mung dal for urad dal.

Ingredients:
Soak these in water for 2 hours:
Mung dal(yellow)-1/2 cup
Boiled rice or Sona masoori rice-1 cup
Fenugreek seeds-1 tsp

Other ingredients:
Hing-1/4 tsp
Salt
Red chilli-1
Curry leaves
Green chilli chopped-1
Chopped ginger-1 tsp
Sour Yogurt-1/3 cup

Method:
After soaking the dal and rice, rinse and grind along with red chilli, salt and hing with some water to a coarse paste.
The batter should be of dosa batter consistency-neither too thick nor too thin.
Add rest of the ingredients and mix well.
Heat a flat griddle. Spread some oil.
When the griddle is hot, pour a ladle full of batter and spread it in circular fashion.
Drizzle oil around the corners.
When one side turns golden brown, flip and cook the other side.

Recipe courtesy: Indian Vegetarian Recipes