Wash and soak the soyabeans overnight. Pressure cook for 10 minutes. Finely chop ginger, garlic tomato, onion and green chillies. Heat soya refined oil in a thick bottomed pan. Add ginger and garlic. After they turn golden brown, add onion and saute till light brown. Add diced tomatoes to this mixture and stir till it leaves the sides of the pan. Add green chillies, salt, turmeric and red chilli powder followed by boiled beans and saute for two minutes. Add 2 cups of water and simmer for 5-10 minutes. Sprinkle chaat masala. Serve hot.