Soak Kidney beans for 5-6 hours. Add salt and cook in a pressure cooker. Roast red chili. Grind red chili, green chili, tomato sauce, chili sauce, vinegar and 1/2 part of beans in the mixture. Make paste.
Heat oil in a frying pan. Stir in the paste for two minutes, Add water and boiled beans. Mix and boil for a few minutes. Add salt and pepper. Serve this curry with rice.