To begin with making Vegetable Manchurian let us start with making the ‘Balls’. 

Making Manchurian ‘Balls’ - 

1. Combine carrot, cabbage, beans, ginger, chilly, onion, bread, salt, black pepper powder, soy sauce in a food processor and pulse for half a minute or till everything is well combined and forms a dough like consistency.
2. Altenatively, you can also finely chop all these veggies, but that would take time. So if you have a food processor, better go for that.
3. Transfer this dough in a bowl. Now greaze your palms with oil and make lemon size balls of this dough.
4. In a bowl make a ‘Slurry’ by mixing cornflour with some water.
5. Dip each ball in this slurry and deep fry in hot oil till golden and crisp on outside.
6. Manchurian balls are ready and now we can proceed with the ‘Gravy’ part.

Making Manchurian ‘Gravy’ - 

1. Make a ‘Slurry’ or ‘Solution’ with cornstarch, water and all the sauces. Keep it aside.
2. Heat 1 tablespoon of oil in a pan and saute ginger, chilly, garlic, spring onion for few seconds. Do not over cook, there should be a BITE in the veggies.
3. Add in the cornflour slurry and stir. Let it come to a boil.
4. After a boil you would notice that the gravy has started thickning. Season with salt, black pepper powder, vinegar and cook for a minute.
5. Now, gently slide in the ‘Balls’ and cook for another minute.
6. Remove from heat. Vegetable Manchurian Gravy is now ready, garnish with spring onion and serve hot. 

Notes - 

1. Chinese food is known for ‘Crunchiness’. So never over cook veggies in a Chinese preparation. They must retain a BITE.
2. While making Manchurian ‘Balls’ if you find that the mixture is dry, then add few drops of water. On the contrary, if your mixture is very wet….then add some bread crumbs or corn starch.
3. Before deep frying balls, you need to check your mixture. So start with frying one ball. If it comes out clean, then congrats....!!!!…..otherwise return to the above step number 2.
4. While deep frying the ‘Balls’ keep the flame on low to medium. If you fry on high flame, then though balls might look perfectly cooked on the outside, but they would be raw or under cooked for sure from inside.
5. While making ‘Gravy’, remember that all the cooking has to be done on ‘High Flame’. Hence keep all ingredients in reach, else you are going to burn your veggies.