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up close shot of open faced tuna melt with tomato slice and melted cheese on top
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Open-faced Tuna Melts

These open-faced tuna melts are made with the most delicious tuna salad recipe, hamburger buns, tomatoes and melted cheese! An affordable and filling lunch or dinner idea!
Prep Time10 mins
Cook Time10 mins
Course: Main Course
Cuisine: American
Keyword: open faced tuna melts
Servings: 6
Calories: 278kcal
Author: The Endless Appetite


  • 3 Hamburger Rolls
  • 12 oz Tuna in water
  • 1/3 cup Mayonnaise
  • 1 Tbsp. Lemon Juice
  • 1/2 Tbsp. Mustard dijon or spicy brown
  • 1/4 cup Red Onion diced
  • Salt
  • Pepper
  • 6 Tomato Slices
  • 1 cup Cheddar Cheese shredded


  • Preheat oven to 375 degrees.
  • In a bowl, combine tuna, mayonnaise, lemon juice, mustard, red onion, salt and pepper to taste. Stir until well combined.
  • Separate the hamburger rolls into 6 different pieces and place them cut side up on a cookie sheet.
  • Divide tuna salad between the hamburger buns. Top with a slice of tomato. Spread cheese evenly on top of the tomatoes.
  • Bake for about 4-5 minutes. Remove from oven and turn the broiler on. Broil for 3-4 minutes until cheese is melted and golden brown.


Calories: 278kcal | Carbohydrates: 13g | Protein: 18g | Fat: 17g | Saturated Fat: 6g | Cholesterol: 45mg | Sodium: 459mg | Potassium: 221mg | Fiber: 1g | Sugar: 3g | Vitamin A: 446IU | Vitamin C: 5mg | Calcium: 185mg | Iron: 2mg