Mix cornflour, refined flour, ginger-garlic paste, MSG, lemon juice, salt and black pepper powder in a bowl with enough water to make a thick batter. Add the vegetables and mix so that all the vegetables are well coated.
Heat enough oil in a wok and deep fry the vegetables. Drain on absorbent paper and set aside. For the sauce heat two tablespoons of oil in a pan. Add garlic, ginger, celery, spring onions and green chillies and sauté for a minute.
Add soy sauce, red chilli sauce, tomato ketchup, salt and black pepper powder and sauté for half a minute. Add all the fried vegetables and mix well Serve hot.