- In a bowl, add some chili paste, salt, cornstarch, all-purpose flour, little water and make a slightly thick batter. Put in the potato pieces in this mixture and mix gently to coat all the potato pieces nicely. Heat oil in a pan and deep fry the potato pieces until golden in colur and crisp. For making the slurry, in a bowl add tomato ketchup, vinegar, MSG, salt, soya sauce, green chili sauce, pepper powder and mix well.Keep this mixture aside. Heat little oil in a pan and when it is hot, add finely chopped ginger, garlic, green chilies, green bell peppers and onions. Slightly sauteed and add the slurry, mix and bring to a boil. Add the fried potatoes and toss well. Sprinkle some spring onions, mix and switch off the flame. Serve hot.