Make the batter: Beat the egg with the flour, then gradually add water until the mixture is smooth and thick, but not too dense. Add a pinch of salt, the minced garlic, chopped cilantro, and the teaspoon of baking powder.

Pat the cod dry and lightly coat with flour. Dip each piece into the batter, then fry in olive oil. Serve hot and crispy. The cod will be fluffy and flavorful inside.

Let drain on paper towels.