Tuna Melt Tostadas

Instead of sandwich bread, this tuna melt sits pretty on a crunchy tostada, topped with lettuce, tomato, avocado and sour cream.

Serves: 3 Save

Ingredients (12)

  • 1 (15-oz) can tuna in water, drained
  • 1/3 cup reduced-fat mayonnaise
  • 2 tablespoon spicy brown mustard
  • 1/4 cup dill relish (like Heinz)
  • 1/2 teaspoon salt, plus more for topping
  • Pepper
  • 6 corn tostadas
  • 1 cup shredded sharp cheddar cheese
  • 1 head romaine lettuce, sliced into ¼-inch strips
  • 4 Roma tomatoes, diced
  • 1 avocado, diced
  • Light sour cream

Ingredient Facts and Health Benefits

Discover fascinating facts and health benefits about some of the ingredients in the recipe, including other delicious recipes!


  1. Preheat oven to 375° F. Stir together tuna, mayonnaise, mustard, relish, salt and pepper in a bowl.
  2. Spread the mixture evenly over each tostada and sprinkle cheese on top. Bake 8 minutes, until cheese is melted and tostada edges are just starting to brown. Remove from oven and top with lettuce, tomato, avocado, sour cream, salt and pepper.