Heat a non stick pan with 1 tsp oil, add the finely chopped onions from the spring onions, then add finely chopped garlic. Sauté till the onion bulbs turn colour. Keep the green of the spring onions for latter use.
Next add ginger garlic and chili. Add soy sauce. Followed by tomato sauce
In a small bowl mix the corn flour with little water to form a lump less batter. Once paste is fried, add this to sauce. Adjust salt. Fry on high flame so that the sauce thickens. Just make sure it doesn't become too thick.
Add fried vegetable balls to the sauce. along the green onions stocks. simmer for 1 min.
If you don't want the Manchurian to be soggy, add just before serving.
I served this with Yellow Pepper, Corn Fried Rice