In a mixing bowl, add murmura and water. Soak it for 15 minutes.
Then in another bowl, add semolina and buttermilk. Mix well and soak it for 15 minutes.
Meanwhile, in bowl, mash 3 medium size boiled potatoes. Add salt, turmeric powder, red chilli powder, coriander powder, garam masala, powder sugar, lemon juice, chopped onion, masala sing and coriander leaves. Mix well.
Grease your hand with oil and make medium size tikki from the masala. Keep it aside.
Now remove water from soaked murmura and add into mixture jar. Also add soaked semolina, salt and some water. Grind it into a smooth batter. Do not add more water while grinding the batter.
Take out grinded batter into a mixing bowl and whisk it for 2 minutes.
Then add red chilli flakes and oil. mix well until the batter turns frothy.
Now grease the cup with oil. pour 1 ladle of idli batter into each cup.
Then place masala tikki into the centre and cover the tikki with another ladle of batter.
Sprinkle some red chilli powder on each idli cup.
Place the cups into a steamer and steam for 12 minutes on a high flame.
Once done take out the plate from the steamer & allow it to cool for 5-10 min.
Demold it and Cut it into desired shape.
Serve instant stuffed murmura idli with tomato ketch up of chutney.