Marinate the cleaned and de-veined Zappfresh prawns in tomato sauce, vinegar, soya sauce, brown sugar and red chili paste for 15-20 mts. Heat oil in a wok or kadhai, swirl it all over and it should be smoking hot. Add the minced garlic and ginger and saute for a few seconds. Add the chopped spring onion whites and green chilies stir for 2 mts, constantly tossing them. Add the marinated prawns along with any left over marination and cook on high heat for a mt without tossing. Flip the other side and cook for another mt. Combine once again and cook on medium heat for 3 mts or till done, tossing constantly. Season with salt. Garnish with spring onions greens and serve hot as an appetizer or stir fry.