Mix all the sauces in a bowl.
Make Slurry of cornstarch in about 1/4 Cup of water.
Heat oil in wok/kadhai.
Add Finely chopped/minced ginger garlic and green chilies.
Sautee till the raw smell of garlic goes away
Add cubed onions and bell peppers, sauté for 1-2 minutes.(optional)
Add sauce mix and mix well.
Add cornstarch slurry and mix well.
Add water(about 1/2 cup for dry version) and 1 1/2 cup for gravy version. Adjust accordingly.
Cook the gravy till it starts getting thick and glossy.
Drop the fried Manchurian balls.
Mix well with light hands.
Switch off the flame and garnish with fresh cilantro/coriander and spring onion greens.