Soak the kidney beans or rajma overnight and pressure cook with some salt.
Drain the rajma water and let it dry for sometime. Mash the Rajma roughly.
Boil the potatoes along with some salt and mash them. Do not overcook the potatoes.
Boil sweet corn, chopped carrots and peas with some salt and drain them well. Once they are dried, mash them. Do not overcook the veggies.
For making the bread crumbs, blitz 6-7 slices of white bread in a mixer.
Now in a large mixing bowl, add the mashed rajma, potatoes and veggies and add half cup of bread crumbs, 1 finely chopped onion, 6 to 7 pieces of picked jalapenos finely chopped, finely chopped capsicum, finely chopped coriander, kashmiri red chilli or paprika powder, cumin powder, coriander powder, garam masala, 1 tablespoon ginger garlic paste, 1 tablespoon corn flour, 1 tablespoon plain flour, salt to taste. Mix all the ingredients well and bind to a dough type consistency. Do not add any water while mixing.
The mixture should look like this once well mixed.
Take a big portion of this mix and roll and flatten with hands to the shape of a disc type patty. Roll the corners on a flat surface for perfect corners. Repeat this process for the remaining mixture. This recipe should yield approximately 6 veggie patties.
Take 2 tablespoons of corn flour and plain flour each and add around ¾ cup water and a pinch of salt and mix well and make a slurry.
Spread the remaining breadcrumbs on a plate.
Now coat the patty on both the sides in the slurry.
Now coat the patty in the breadcrumbs.
Repeat coating the patty in slurry one more time and in the bread crumbs again.
Do this double coating of slurry and bread crumbs for all the remaining patties.
Freeze the prepared patties in the freezer for at least 1 hour.
In the meanwhile, dice the onions lengthwise and deep fry them on medium flame till they are golden brown. Keep them aside.
Mix mayonnaise, ketchup and chilli sauce to form a homogeneous sauce. Keep them aside.
Soak the iceberg lettuce leaves in ice cold water. Cut the tomatoes in round pieces.
Heat oil in a kadai or pan and fry the frozen patties on a medium flame till it is golden brown in colour. You could also shallow fry them.
Drain the patties on a kitchen towel.
Cut the burger buns in half and toast them slightly on tawa with some butter.
Apply the mayonnaise and ketchup mixture generously on both sides on the toasted bun.
Now on the base of the bun, keep one slice of cheese single, lettuce leaves, followed by the fried patty, two slices of tomato, some pickled jalapenos pieces, fried onion.
Place the top piece of the toasted bun and serve hot along with some French fries or Potato Wedges.