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Easiest-Ever Tuna Melt

Tuna might be in the name, but the most important ingredients here are the kitchen staples that bring the real-deal deli flavor—from sharp whole-grain mustard and cornichons to classic dill and red onion. And after a couple run throughs, you’ll have this one memorized by heart.

Get the recipe for The Tuna Melt:

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Easiest-Ever Tuna Melt

  • Author: Misfits Market


  • 1 can of tuna, drained
  • 3 tablespoons mayonnaise
  • 2 teaspoons lemon juice
  • 1 teaspoon whole-grain mustard
  • 2 tablespoons cornichons, finely chopped
  • 1 tablespoon red onion, finely diced
  • 1½ tablespoons fresh dill, chopped, divided
  • ½ teaspoon kosher salt
  • ½ teaspoon freshly ground black pepper
  • 2 slices sourdough (or any bread)
  • 1½ tablespoons butter
  • 3 ounces sharp cheddar, grated (or 2 slices)
  • 1 tomato, thinly sliced


  1. Position oven rack second down from the top, then preheat broiler.
  2. In a medium bowl, add tuna and flake it up with a fork. Mix in mayonnaise, lemon juice, mustard, cornichon, red onion, 1 tablespoon dill, salt, and pepper. Set aside.
  3. Spread butter on both sides of each slice of bread, then arrange on a lined baking sheet. Toast the bread in the oven until golden brown, 2 to 3 minutes on the first side. Take bread out of the oven and turn it over onto the untoasted side.
  4. Evenly distribute tuna salad onto the untoasted side of each slice. Add a few slices of tomato on top, then divide the cheese over the tomatoes.
  5. Place the tuna melt back into the oven and broil, keeping a close eye on the cheese, until the cheese has melted, is looking bubbly, and is just starting to brown, 3 to 5 minutes.
  6. Serve tuna melt topped with remaining dill and enjoy!

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