Prepare Seafood: Chop cod, shrimp, and squid into small pieces suitable for processing.
Blend Seafood Mixture: In a food processor, combine the seafood with garlic, onion, salt, sugar, white pepper, and blend until smooth.
Add Binders: To the blended seafood, add grape seed oil, all-purpose flour, potato starch, and egg white. Blend again until the mixture is creamy.
Shape and Cook: Heat vegetable oil in a pan. Shape the fish cake mixture and fry on low heat until cooked through. Ensure to turn them over for even cooking.
Serve: Once cooked, remove from oil and serve as desired. Can be enjoyed as a snack, appetizer, or used in various dishes like soups, stews, and kimbap.