Take a deep bowl add gram flour, semolina, sugar, curd, salt, turmeric powder, and one tablespoon oil and mix it well. Now gradually add water and make a smooth batter. The batter should not be very thick or thin.
Cover it and keep aside for 15 to 20 minutes.
Heat a pan and add one tablespoon oil and add cumin seeds when seeds get changing color, add asafoetida and add chopped onion, capsicum and saute.
Saute it on medium flame and cook till it becomes little soft. Do not overcook let it be crunchy. Now add red chili powder, garam masala, tomato sauce, lemon juice, black pepper and mix well. Stuffing is ready.
Now take an idli mold and cut each slice of bread with the help of Katori or cookie cutter into round shape and in the same size of idli mold so that it can be get fitted in the idli mold while steaming.
Grease the idli mold with some oil and keep aside. Now take a deep pan and pour some water and let the water boil. Now we arrange bread roundels on idli mold.
After 15 minutes uncover the batter, add little water and mix well.
Take an idli mold and put bread roundels onto the idli mold.
Now spread 1 or 1 1/2 tsp of stuffing onto the bread roundels and slightly press it with the help of a spoon.
Now add Eno in the batter and mix it well. After adding Eno do not stir too much otherwise bubbly effect will go away.
After adding Eno does not keep batter for a long time otherwise dhokla will not be spongy so spread the batter immediately onto the stuffing.
Put the idli mold in boiling water, cover with the lid and cook it for 5 to 6 minutes on medium flame.
For tempering, heat oil in a pan and once the oil becomes hot and add mustard seeds and let it crackle. Switch off the flame and add curry leaves and green chili.
After 5 to 6 minutes uncovered the lid and you will see the dhokla has become fluffy. Take out the idli mold from the pan and let it cool down. Once it cools down remove bread dhokla sandwich from it.
Scrap the extra dhokla from sides and give a perfectly round shape. Now spread tempering over it. Our bread dhokla sandwich is ready to serve.