Take 1 kg of mutton keema in a bowl. To marinate it, put 1 tbsp of fresh lemon juice, tomato sauce, white vinegar, dark soya sauce, and 1 tbsp of ginger and garlic paste. (Pro tip: Lemon juice and soya sauce add to the taste and flavor and also help mutton to cook properly. You may add ginger and garlic powder as an alternative to their paste).
Follow it with 1 tbsp of dry red chili powder, salt to taste, 1 tsp of black pepper powder, 1 tsp of crushed mixed herbs (optional), 1 tsp of garam masala powder, 3 tbsp of corn flour, and 2 tbsp of gram flour (besan).
Finally, add ¼ cup of bread crumbs and 1 tbsp of soyabean oil.
Mix them nicely.
Take a circular cover of any container and put a piece of plastic over it. Then a bit of the mutton keema paste on it.
Cover it with another piece of plastic. Press it with your hand to flatten it and give it a round shape.
Remove it from the lid along with the two pieces of plastic on it.
Repeat the process to make all the mutton patties. Stack them on a plate and refrigerate them for 4 to 5 hours.
Take out as many mutton patties as you want. Remove the plastic covers from them.
Shallow fry the patties on a low flame.
Flip when one side is done.
Remove the patties when they turn brown in color.
Take a burger bun. Cut it in half horizontally.
Apply 1 tbsp of mayonnaise on the inside of each piece of bun.
Put 4 to 5 circular slices of fresh tomato and cucumber on it.
Arrange 2 to 3 small fresh lettuce leaves and place the mutton patty on top. You may put a bit of mayonnaise on top of it as I have.
Put one cheese slice.
Put the other half of the burger bun on top of it and your homemade mutton burger is ready to eat.