Grind rava to a fine pwd and add whole wheat flour and pinch of salt and mix
Add curd and make a batter by adding water
Keep it covered for 10 minutes
Meanwhile cook Arhar dal along with haldi pwd and salt for 4-5 min
Heat oil in a wok and add mustard seeds as it sputter add chopped veggies and stir add haldi powder, chilly pwd and salt
Cook for 4-5 min
Add tomato paste and cook
Open the lid and whisk dal
Add cooked veggies and pressure cook for one whistle
Roast channa dal along with oil
Grind coconut, roasted channa dal, green chilly and salt to a fine paste
Adjust consistency by adding water
For tadka heat oil in a pan and add mustard seeds, red chilli and curry patta and let it sputter add this tadka to chutney and mix it nicely
Tadka for Sambhar.. Heat oil and add urad dal and channa dal and mustard seeds as it turns brown add red chilly and curry leaf and transfer this to cooked dal
Add Sambhar masala and tamarind pulp and let it simmer for 10 minutes
For dosa filling heat oil in a wok and add jeera as it sputter add haldi powder, coriander pwd and red chilly and mix add mashed potato and salt and cook it
Heat griddle and grease it put one spoonful batter on it and spread it evenly
Put potato on one side and fold it
Serve it with hot piping Sambhar and coconut chutney
