Soak rajma in water for 3-4 hours
After 4 hours pressure cook, allowing for 5-6 whistle or until cook well
Drained out the excess water
Now in a pan or kadahi add 1 tbsp ghee or oil
Pour chopped onion, cook till translucent,add ginger green chilli paste
Add rajma,mix with spatula
Add salt,red chilli powder, coriander powder,salt, turmeric powder saute for 30 second
Add red chilli sauce,soya,sauce, tomato sauce, chilli flakes,mix well
Turn off flame,add mozzarella cheese,mix well
Now cut out small circles from buns, leaving margins
In a bowl microwave 1 tbsp butter with chopped garlic cloves and oregano
With the help of brush apply butter inside all over the buns
Fill rajma in buns with the help of spoon,garnish chopped tomato, coriander leaves and grated cheese
Bake in oven for 15 minutes
Remove from oven spread some sauce serve hot