In a kadai, heat 3-4 tablespoons of oil. Add 1 tablespoon of chopped ginger, 2 tablespoons of chopped garlic, and 2 chopped green chilies. Sauté over high heat.
Add ½ cup of chopped onion and sauté it.
Add ½ cup of sliced capsicum and 2-3 chopped green onion bulbs (white part). Continue to sauté.
Add 1 tablespoon of soy sauce, 1 tablespoon of red chili sauce, 2 tablespoons of tomato sauce, 1 tablespoon of vinegar, ½ teaspoon of Kashmiri red chili powder, a pinch of salt, and ½ teaspoon of black pepper powder. Mix well.
Add ½ cup of water and mix. When the sauce starts to boil, prepare a slurry by mixing 1 tablespoon of cornflour with 3 tablespoons of water in a separate bowl.
Add this cornflour mixture to the kadai and stir well.
As the mixture starts to thicken, add the prepared Manchurian balls, some chopped spring onions, and coriander leaves. Mix well. Do not cook the Manchurian for too long. Switch off the gas.
Your dry Manchurian is now ready to be served hot.