Crispy Fish Sandwich

Ingredients for Crispy Fish Sandwich

• 1 small red onion, thinly sliced into rounds

• 110g bread-and-butter pickles, plus 1/2 cup brine

• 3/4 cup mayonnaise

• 1/3 cup chopped dill

• 2 teaspoons hot sauce

• 1 teaspoon freshly ground black pepper

• 2 teaspoons fresh lemon juice, plus wedges for serving

• 1 tablespoon kosher salt, divided

• 2 large eggs, lightly beaten

• 190g panko (Japanese breadcrumbs)

• 60g plain flour

• 2 flounder fillets (about 300g total), cut in half crosswise on a diagonal

• 2/3 cup vegetable oil

• 3 cups shredded iceberg lettuce

• 8 slices Pullman bread

• 240ml crisps, plus more for serving

Combine onion, pickles, and pickle brine in a small bowl.

Mix mayonnaise, dill, hot sauce, pepper, 2 teaspoons lemon juice, and 1/2 teaspoons salt in another small bowl.

Place eggs, panko, and flour in 3 separate shallow medium bowls. Season each fish fillet with 1/2 teaspoons salt. Working one at a time, dredge fish in flour, shaking off excess. Coat evenly with egg, allowing excess to drip back into bowl. Coat with panko, pressing to adhere. Transfer fish to a plate.

Heat oil in a large skillet over medium. Cook fish until breading is golden brown and cooked through, 2–3 minutes per side. Transfer fish to a paper towel-lined plate. Season fillets with 1/2 teaspoons salt total.

Spread 1 heaping Tbsp. mayonnaise mixture on one side of each slice of bread. Pile each bottom slice with 3/4 cup lettuce, 1 fish fillet, a small handful of crisps, and 40g onion mixture. Close sandwich with second slice of bread, mayo side down, and push down lightly to crush crisps. Transfer to a platter. Repeat with remaining sandwiches. Serve with lemon wedges and more crisps alongside.

Do Ahead: Pickled onions and dill sauce can be made 1 day ahead. Cover and chill.

Disclaimer

While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.