Soak the rajma in water overnight.

Cook the beans in pressure cooker. make sure that they are soft and can be mashed.

Filter the water from beans.

Boil,peel,mash the potatoes.

In a large bowl mash beans and add mashed potato and spices and mix well.

Add oil in a pan and add potatoes & beans and saute it for 5 -6 min at low flame.

Cut the bun from centre and spread the sauce on bottom slice and spread masala gravy on it.

Put the cabbage leaves, onion slice,tomato slice on it and cover it with another slice of bun.

Fry it on tawa with butter.

Serve it hot now.