1Prepare the seafood: Ensure the Squid, Shrimp, and Mussels are thoroughly cleaned and chopped into appropriate bite-sized pieces. Pat them dry with a paper towel.
3Make the batter: In a large mixing bowl, whisk together the All-purpose wheat flour, Rice flour, Fine sea salt, and 5 grams of Gochugaru. Gradually add the Cold water while whisking until a smooth, lump-free batter forms. Beat the Large egg lightly and stir it into the batter.