In a mixing bowl, mix together all the ingredients listed for Manchurian balls
Make a dough with this mixture.
Divide the dough into equal parts and make small round balls of it.
Heat oil in a pan/kadhai on medium heat and deep fry them till they are golden brown.
Take them out on a kitchen towel and keep aside.
Now heat another pan on medium heat and add oil. To this oil, add chopped spring onion, ginger and garlic and sauté for 5 minutes.
Add Soy sauce, Chilli sauce, vinegar and ketchup to it and mix well. Add salt, sugar and black pepper powder and mix again.
Add 1 cup of water to it and let the sauce boil. In a bowl add 1.5 tablespoon of cornflour and 2 tablespoon of water and mix it well. Add this to the sauce and let it cook on slow heat till it start thickening.
Add the Manchurian balls and again cook for few minutes. Switch off the flame till you get desired consistency.
Serve hot and enjoy it with fried rice or veg Hakka noodles.