Take 750 grams (1 medium-sized) cabbage, roughly chop it, and add it to a mixer jar. Pulse a few times until it is finely chopped. Do not grind it into a paste.
Add salt to the chopped cabbage, mix well, and let it rest for 10 minutes.
Squeeze out all the excess water from the cabbage and transfer it to a mixing bowl.
Add 2 chopped green chilies, 1 tablespoon ginger-garlic paste, 1 tablespoon Kashmiri red chili powder, and ½ teaspoon black pepper powder. Mix well.
Add ½ cup cornflour, ½ cup all-purpose flour (maida), and a pinch of salt. Mix everything well until the mixture binds properly. If it doesn't bind, add a little more cornflour.
Lightly grease or wet your hands, take small portions of the mixture, and shape them into small Manchurian balls.
Heat oil in a kadai. Fry the Manchurian balls over medium heat until they turn golden brown and crispy from all sides. Remove and keep aside.