In a mixing bowl, add 2 cup dosa rice and 1 cup small grain rice, 1 cup urad dal and 1 tsp methi dana. Wash and soak it for 4-5 hrs.

Now remove water from the soaked grain and keep it aside. Use water while grinding the batter.

Then in a mixture jar, add soaked grains and some water. Grind batter into a smooth and ribbon-like consistency.

Take out batter into mixing bowl and whisk batter in one direction.

Cover and ferment batter to keep it in warm place. You can cover the batter with a thick blanket or keep it in oven or instant pot.

After 6-7 hrs, the batter is properly fermented.

Now add ¼ cup idli rava and mix well.

The Dosa batter is ready.

In a pan, add oil, mustard seeds, urad dal, chana dal, curry leaves, chopped green chilli, chopped ginger and a pinch of hing. Saute it.

Now add the onion slice and saute till it is slightly transparent.

Then add turmeric powder and mix well.

Now add 2 cups boiled potatoes, salt to taste, some coriander leaves and lemon juice. Mix well.

Then sprinkle some water and cook masala on low flame for 3-4 minutes.

Switch off the gas and the potato masala is ready. Keep it aside.

In a pan, add oil and chana dal. saute till the dal is slightly golden brown.

Now add Kashmiri red chilli and tomatoes. Saute on high flame.

Then add onion slices and tamarind pieces. Saute it.

Switch off the gas and cool down the mixture.

Add the chutney mixture into the mixture jar. Also, add salt and water.

Grind it into a smooth paste and take it out into a bowl.

Now in a tadka pan, add oil, mustard seeds, chana dal, urad dal, jeera, curry leaves and dry red chilli. Saute it.

Add the tempering to the chutney and mix well.

Spicy and tasty tomato chutney is ready.

In a dosa batter, add salt and water. Mix well.

Now heat, tawa and grease it with oil. Spread dosa batter with a ladle.

Spread some butter and oil on the dosa.

Cook dosa on low to medium flame till it is crispy.

Remove some extra batter with a ladle (refer to video)

Place masala on dosa and fold cooked dosa.

Masala dosa is ready. Serve hot with chutney and sambar.