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Delicious Tuna Melt on Sourdough with creamy tuna salad and melted cheese

Tuna Melt on Sourdough

A comforting and crispy tuna melt sandwich using tangy sourdough bread and cheesy tuna filling, perfect for a quick lunch.
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Prep Time 10 minutes
Cook Time 10 minutes
Total Time 20 minutes
Servings: 2 servings
Course: Lunch, Snack
Cuisine: American
Calories: 550
Ingredients Method Notes

Ingredients
  

For the Tuna Filling
  • 1 can canned tuna Preferably tuna in water for a cleaner flavor.
  • 3 tablespoons mayonnaise Can be swapped with Greek yogurt for a lighter version.
  • 1 teaspoon Dijon mustard Optional, for added flavor.
  • 1/2 cup celery, chopped Can substitute with chopped pickles or diced cucumber.
  • 1/4 cup red onion, finely chopped Use less if strong onion flavor is a concern.
  • 4 slices cheese (Cheddar, Swiss, Provolone, or Mozzarella) Sharp cheddar is preferred for flavor.
For the Sandwich
  • 4 slices sourdough bread Thick slices toast best.
  • 2 tablespoons butter For crisping the outside of the sandwich.

Method
 

Preparation
  1. Drain the tuna well and mix it in a bowl with mayonnaise, a squeeze of mustard (if using), chopped celery, red onion, salt, and pepper.
  2. Taste the mixture and adjust seasoning with salt or a splash of pickle juice if necessary.
Building the Sandwich
  1. Lay out sourdough slices. On the bottom slice, add a layer of cheese, followed by a thick layer of the tuna mixture, and then top with another layer of cheese.
Cooking
  1. Spread softened butter on the outside of both bread slices.
  2. Heat a skillet on medium-low and cook the sandwich for 3 to 5 minutes per side, pressing gently with a spatula.
  3. Adjust the heat if the bread browns too fast to ensure the cheese melts thoroughly.
Finishing Up
  1. Let the sandwich rest for 1 minute before slicing.

Notes

Drain tuna well to prevent sogginess. Use cheese that melts well. Optionally toast sourdough slices before assembling the sandwich.