Take a big bowl add boiled kidney beans and potato and mash it properly.
Now add all rest of ingredients except oil, onion,tomato sauce and mix it well altogether.
Now take a handful of portoin from the mixture and give the shape of burger to the mixture.
Prepare all patties with the same process.
Heat oil in a pan,shallow fry all the patties on medium flame from the both sides evenly.
Finally assemble the Patties Burger, firstly take a patties as a base,spread tomato sauce over it,add onion slices and tomato slices,sprinkle chaat masala and black salt and add another patties on the top as a upper portion of burger.
Kidney Beans Patties Burger is ready to serve....serve this burger hot.
