In a bowl take boiled and mashed red kidney beans, chopped mushrooms, chopped onion, chopped red, green and yellow bell peppers, grated cheese, ginger powder, garlic powder, crushed black pepper, red chilli flakes, chopped coriander and a little salt. Mix them all well to prepare the stuffing for the sandwich. Cut the edges of the bread slices. Stuff a slice of bread with the prepared mixture. Cover it with another slice. Press the sides of the bread and cut the corners and give it a round shape. Make a few more stuffed sandwiches. Heat oil in a pan.Deep fry the stuffed sandwiches. Using a tissue paper drain the excess oil. Transfer the sandwiches to a serving plate. Garnish the plate and sandwiches with tomato sauce and parsley.