Chop all the vegetables and wash thoroughly. Heat oil or ghee. Add chopped onion, the rest of the vegetables and the dal, and boil till dal is cooked. Mash with eggbeater (Sindhis use "Mandhiaro", a wooden stick). Temper with garlic. Garnish with cheese, tomato slices and coriander leaves and serve hot.
Variation: If there is any Sai Bhaji left, dry the bhaji and make Sai Bhaji Tikki by shallow frying on the tawa, then serve as a snack with tomato sauce.