Soak Rajma overnite, Cook till little less than tender with 1 onion, garam masala and green chillies, ginger garlic minced.
Pour oil in the pan, saute the onion till white in colour, add the chopped tomatoes, cook till tender, add salt, pepper powder and tomato sauce, stir for about 5 mins.
Transfer contents in a baking dish, garnish with cheese and bake for about 20 mins at 200 degrees.