Dosa Ingrediants:
Raw Rice   - 1/2 kl
Black Gram   - 300 gm
Salt    - rqrd

Procedure:
Wash and soak rice and black gram for 4-6 hours. 

Grind and keep aside for nearly 8 hours.

Put required salt and water, mix it together.

Masala Ingrediants:
Potato   - ½ kl
Onion   - ¾ kl
Curry Leaves  - 1 stem
Green Chili  - 5
Mustard Seeds  - 1 sp
Turmeric Powder - ½ t sp
Coconut Oil  - 2 ds sp
Salt   - rqrd

Procedure:
Boil the potato, peel and mash it. In a pan pour coconut oil, splutter mustard seeds.

Add sliced onion and green chili (cut in round) and sauté well. 

When it turns brown add smashed potato, turmeric powder and salt.  Mix well Remove from fire.

Heat the frying pan and apply oil on it. Pour one ladle grinded mixture on the frying pan and spread it evenly.

Keep the potato masala in the middle and fold it from both sides. Cook both the side of dosa until it turns brown.