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Sheet Pan Tuna Melts (Easy Oven Method)

Crispy oven-baked tuna melts made on a sheet pan with creamy tuna, melted cheese, and toasted bread.
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Prep Time 10 minutes
Cook Time 15 minutes
Total Time 25 minutes
Servings: 4 sandwiches
Course: Dessert, Snack
Cuisine: American, Autumn
Calories: 350

Ingredients
  

Tuna Mixture
  • 2 cans tuna drained
  • 0.33 cup mayonnaise
  • 1 tsp Dijon mustard
  • 0.25 cup red onion finely chopped
  • 0.25 cup celery finely chopped
  • 1 tbsp lemon juice
  • 0.5 tsp salt
  • 0.25 tsp black pepper
Assembly
  • 8 slices bread
  • 8 slices cheese cheddar or Swiss
  • 2 tbsp olive oil or butter for brushing

Equipment

  • Mixing bowls
  • Baking sheet
  • Wire rack
  • Hand mixer or stand mixer

Method
 

  1. Preheat oven to 400°F (200°C) and line a baking sheet with parchment paper.
  2. In a bowl, mix tuna, mayonnaise, Dijon mustard, onion, celery, lemon juice, salt, and pepper.
  3. Arrange bread slices on the baking sheet and brush with oil or butter.
  4. Flip bread, spread tuna mixture evenly, and top with cheese slices.
  5. Bake 10–12 minutes until cheese melts and bread is toasted.
  6. Broil 1–2 minutes for extra browning if desired. Serve hot.

Notes

Best served immediately while cheese is hot and bubbly.