In a mixing bowl, add chopped cabbage, all purpose flour, cornflour, salt, black pepper powder and make a dough.
Divide the dough in equal portions and make lemon size balls out of them.
Heat oil over medium heat and deep fry all the balls till they are golden brown. Keep them on a kitchen towel.
In a separate pan, heat oil over medium heat and add chopped garlic and ginger. Sauté till the raw smell fades away. Now add chopped onion and bell peppers to it and sauté again for 4-5 minutes.
Add soy sauce, chilli sauce, vinegar, salt, pepper powder and brown sugar and mix everything well. Now add Manchurian balls to it and mix so that the balls are well coated with sauces.
Spread sesame seeds on top and switch off the heat.
Transfer in a serving bowl and serve hot. Enjoy it with either veg fried rice or veg Hakka noodles.