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Bronzed Fish Sandwich with Homemade Tartar Sauce and Pickled Onions on a Toasted Brioche Bun

Bronzed Fish Sandwich with Homemade Tartar Sauce and Pickled Onions on a Toasted Brioche Bun

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  • Author: Anna
  • Prep Time: 20 minutes
  • Cook Time: 10 minutes
  • Total Time: 30 minutes
  • Yield: 2 sandwiches
  • Category: Sandwich
  • Method: Pan-Seared
  • Cuisine: American
  • Diet: Low Lactose

Description

This bronzed fish sandwich features perfectly seasoned and seared white fish, creamy homemade tartar sauce, and quick-pickled red onions, all layered on a toasted brioche bun. It’s flavorful, fresh, and full of satisfying textures.


Ingredients

Scale
  • 1/2 lb haddock or any white flaky fish
  • 3 tablespoons olive oil
  • 1/2 teaspoon salt
  • 1/4 teaspoon each paprika, garlic powder, black pepper, chipotle powder
  • 2 brioche burger buns
  • Lettuce leaves
  • 1 large red onion, thinly sliced
  • 1/2 cup warm water
  • 1/2 cup rice or champagne vinegar
  • 1/2 lime, juiced
  • 1 tablespoon sugar
  • 1 teaspoon salt
  • 1 teaspoon black peppercorns
  • 2 garlic cloves
  • 1/2 cup mayonnaise
  • 1/2 cup dill pickles, diced
  • 1 tablespoon chopped onion
  • 1 tablespoon chopped fresh dill
  • 1/2 teaspoon sugar
  • 1/4 teaspoon black pepper
  • 1/2 lemon, juiced


Instructions

  1. Mix paprika, garlic powder, black pepper, chipotle powder, and salt. Rub over both sides of the fish.
  2. Heat olive oil in a skillet over medium-high. Sear fish for 3–4 minutes per side until golden and cooked through.
  3. In a bowl, combine vinegar, warm water, lime juice, sugar, salt, peppercorns, and garlic. Add sliced red onion and let sit for at least 30 minutes.
  4. In a separate bowl, mix mayonnaise, pickles, onion, dill, sugar, black pepper, and lemon juice to make tartar sauce. Chill until ready to use.
  5. Toast brioche buns lightly. Assemble sandwich with lettuce, fish, tartar sauce, and pickled onions.
  6. Serve immediately with your favorite side dish.

Notes

  • Pat the fish dry before seasoning to help it crisp in the pan.
  • The pickled onions and tartar sauce can be made up to 3 days in advance.
  • Use cod or tilapia as a substitute for haddock.

Nutrition

  • Serving Size: 1 sandwich
  • Calories: 510
  • Sugar: 6g
  • Sodium: 820mg
  • Fat: 32g
  • Saturated Fat: 6g
  • Unsaturated Fat: 22g
  • Trans Fat: 0g
  • Carbohydrates: 28g
  • Fiber: 2g
  • Protein: 30g
  • Cholesterol: 75mg