An open-faced tuna melt sandwich is a delightful and easy-to-make meal that combines the savory flavors of tuna, cheddar cheese, and dijon mustard. Perfect for a quick lunch or a light dinner, this recipe offers a warm, cheesy, and satisfying bite with minimal effort.
Most of the ingredients for this recipe are commonly found in your pantry or refrigerator. However, if you don't usually keep dijon mustard on hand, you might need to pick some up at the supermarket. This mustard adds a tangy depth of flavor that elevates the tuna mixture.

Ingredients For Open-Faced Tuna Melt Sandwich
Tuna: A can of drained tuna provides the protein base for the sandwich.
Bread: Choose your favorite type of bread, whether it's white, whole wheat, or sourdough.
Mayonnaise: Adds creaminess and binds the tuna mixture together.
Cheddar cheese: Shredded cheddar cheese melts beautifully and adds a rich, cheesy flavor.
Dijon mustard: This mustard adds a tangy kick to the tuna mixture.
Butter: Softened butter is spread on the bread to create a crispy, golden crust.
Salt: Enhances the overall flavor of the tuna mixture.
Pepper: Adds a touch of heat and depth to the dish.
Technique Tip for This Recipe
To enhance the flavor of your tuna mixture, consider adding a squeeze of fresh lemon juice and a pinch of paprika. This will give the sandwich a zesty kick and a subtle smokiness. Additionally, for a crispier texture, toast the bread slices lightly before spreading the butter and adding the tuna mixture.
Suggested Side Dishes
Alternative Ingredients
tuna - Substitute with canned salmon: Canned salmon provides a similar texture and flavor profile, making it a great alternative for those who prefer a different type of fish.
bread - Substitute with whole grain bread: Whole grain bread adds more fiber and nutrients, making the sandwich healthier while still providing a sturdy base.
mayonnaise - Substitute with Greek yogurt: Greek yogurt offers a creamy texture with fewer calories and more protein, making it a healthier option.
shredded cheddar cheese - Substitute with mozzarella cheese: Mozzarella cheese melts well and has a mild flavor, which can be a good alternative for those who prefer a less sharp taste.
dijon mustard - Substitute with honey mustard: Honey mustard adds a touch of sweetness along with the tanginess, providing a different flavor profile that complements the tuna.
softened butter - Substitute with olive oil: Olive oil can be brushed on the bread for a healthier fat option that still helps achieve a crispy texture when toasted.
salt - Substitute with soy sauce: Soy sauce can add a savory umami flavor while also providing the necessary saltiness.
pepper - Substitute with cayenne pepper: Cayenne pepper adds a bit of heat and spice, offering a different flavor dimension to the sandwich.
Alternative Recipes Similar to This One
How To Store or Freeze This Dish
- Allow the tuna melt sandwiches to cool completely before storing to prevent condensation and sogginess.
- Wrap each sandwich individually in aluminum foil or plastic wrap to maintain freshness and prevent them from drying out.
- Place the wrapped sandwiches in an airtight container or a zip-top freezer bag to keep them fresh in the refrigerator for up to 3 days.
- For longer storage, freeze the wrapped sandwiches in a single layer on a baking sheet until solid, then transfer them to a freezer-safe container or zip-top freezer bag.
- Label the container or bag with the date to keep track of storage time.
- When ready to enjoy, reheat the sandwiches directly from the refrigerator or freezer. Preheat your oven to 350°F (175°C), place the sandwiches on a baking sheet, and bake for 10-15 minutes or until heated through and the cheese is melted and bubbly.
- Alternatively, you can reheat in a toaster oven or microwave for a quicker option, though the bread may not be as crispy.
How To Reheat Leftovers
Oven Method:
- Preheat your oven to 350°F (175°C).
- Place the leftover tuna melt on a baking sheet.
- Cover it loosely with aluminum foil to prevent the bread from becoming too crispy.
- Heat for about 10-15 minutes, or until the cheese is melted and the tuna mixture is warmed through.
- Remove the foil for the last 2-3 minutes if you prefer a slightly crispy top.
Toaster Oven Method:
- Preheat your toaster oven to 350°F (175°C).
- Place the tuna melt directly on the toaster oven rack or a small baking sheet.
- Heat for 8-10 minutes, or until the cheese is melted and bubbly.
- For a crispier bread, you can toast it for an additional 2 minutes.
Microwave Method:
- Place the tuna melt on a microwave-safe plate.
- Cover it with a microwave-safe lid or a damp paper towel to retain moisture.
- Microwave on medium power for 1-2 minutes, checking halfway through to ensure even heating.
- If the cheese isn't fully melted, continue microwaving in 15-second intervals.
Skillet Method:
- Preheat a non-stick skillet over medium heat.
- Place the tuna melt in the skillet, cover with a lid to trap heat.
- Heat for about 5-7 minutes, or until the cheese is melted and the tuna mixture is warmed through.
- For an extra crispy bottom, remove the lid for the last 2 minutes of heating.
Essential Tools for This Recipe
Oven: Used to bake the open-faced tuna melt sandwich until the cheese is melted and bubbly.
Mixing bowl: Used to combine the drained tuna, mayonnaise, dijon mustard, salt, and pepper.
Baking sheet: Used to place the buttered bread slices for baking.
Butter knife: Used to spread butter on one side of each bread slice.
Measuring cups: Used to measure the mayonnaise and shredded cheddar cheese.
Measuring spoons: Used to measure the dijon mustard.
Can opener: Used to open the can of tuna.
Spoon: Used to mix the tuna mixture and to spread it on the bread slices.
Oven mitts: Used to safely remove the baking sheet from the oven.
How to Save Time on This Recipe
Prepare ingredients ahead: Drain the tuna and mix it with mayonnaise and dijon mustard the night before.
Use pre-shredded cheese: Save time by using pre-shredded cheddar cheese instead of shredding it yourself.
Toast bread in advance: Lightly toast the bread slices before adding the tuna mixture to speed up the baking process.
Preheat oven early: Start preheating your oven while you prepare the ingredients to save time.
Batch preparation: Make multiple sandwiches at once and store them in the fridge, then bake when needed.
Open-Faced Tuna Melt Sandwich Recipe
Ingredients
Main Ingredients
- 1 can Tuna drained
- 2 slices Bread your choice
- ¼ cup Mayonnaise
- ¼ cup Cheddar cheese shredded
- 1 tablespoon Dijon mustard
- 1 tablespoon Butter softened
- to taste Salt and pepper
Instructions
- Preheat your oven to 400°F (200°C).
- In a mixing bowl, combine the drained tuna, mayonnaise, Dijon mustard, salt, and pepper.
- Spread butter on one side of each bread slice and place them on a baking sheet, buttered side down.
- Top each slice with the tuna mixture and sprinkle shredded cheddar cheese on top.
- Bake in the preheated oven for about 5 minutes, or until the cheese is melted and bubbly.
- Remove from the oven and serve warm.
Nutritional Value
Keywords
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