Soak Rice and Dal for 3 hours in water...Now drain this and make into a smooth paste ( not so smooth) by adding some water.

Take it in a bowl,Add some salt, chilli powder and mix well.Now add in chopped onion and green chilli, asafoetida, ginger, curry leaves, coriander and mix well. Set this aside till you make the avial.

Grind all the ingredients given in the list to a little coarse paste without adding any water. Set this aside till use.

Take all vegetables in a thick bottom pan. Sprinkle in ½ tsp of turmeric  powder, salt and curry leaves and mix well. Add in water and press the vegetables with your hands so everything is well immersed.

Cover this with a lid and bring it to a boil. Simmer this for 15 mins till the vegetables are done.

Now add in the ground masala and mix well.Cook this for 5 mins.

Take it off the heat and add in yogurt and mix well.

Now make seasoning. Heat oil and crackle mustard seeds and curry leaves. Pour this over the avial and mix well

Now for making ada dosa. Heat a tawa and take a ladleful of batter and spread it thinly on the tawa.Drizzle oil on the edges and cook for couple of minutes until light golden.Now flip it over and cook on under side too..Remove this and store in a hot case.

Serve with avial.