The vegetables needed to make gravy have to be cut as per instruction. Such as garlic, onion, and capsicum.
Again heat a pan with 2 tbsp of oil.
Add chopped garlic along with green chili.
Then add cubed capsicum and onion and fry a little. Keep the gas flame in very high.
Now add all the sauce like tomato sauce, red chili sauce, and dark soya sauce as per mention quantity.
After frying 30-50 seconds, add water to make gravy. let the water boiled.
In this meantime make a mixture of water and cornflour in a small bowl.
When you notice the water just starts boiling, add a tbsp of mixture and stir gently. After that add 1 tbsp of mixture again and stir gently. Continue this process until the gravy becomes thicker.
Thereafter add all the required spices like salt, sugar and black pepper powder. Also, add a tbsp of vinegar.
Now add all the fried Manchurian balls into the gravy. Cook for a minute and turn off the gas.
Your Restaurant style Vegetable Manchurian or Cabbage Manchurian is ready to serve.