Gobi Manchurian

Name: Gobi Manchurian
Ingredients: oil for deep frying; 5 tablespoons all-purpose flour; 3 tablespoons cornmeal; 1/3 cup water; 1 teaspoon ground black pepper; 0.75 teaspoon salt, or to taste; 15 cauliflower florets; 0.75 cup vegetable stock, divided; 1 tablespoon cornmeal; 1 tablespoon soy sauce; 1 tablespoon ketchup; 1 tablespoon chile-garlic sauce (such as Sriracha®); salt to taste; 1 tablespoon vegetable oil; 0.5 cup chopped onion; 1 green chile pepper, finely chopped; 3 cloves garlic, minced; 1 teaspoon finely chopped ginger; 1 green onion, chopped, or to taste