This open-faced tuna melt sandwich is a quick and delicious meal that combines the creamy texture of tuna with the sharpness of cheddar cheese. Perfect for a quick lunch or a light dinner, this recipe is sure to become a household favorite.
Most of the ingredients for this recipe are common pantry staples. However, if you don't usually keep dijon mustard or cheddar cheese on hand, you might need to pick these up at the supermarket. Dijon mustard adds a tangy depth of flavor, while cheddar cheese provides a rich, melty topping.

Ingredients for Open-Faced Tuna Melt Sandwich
Tuna: A versatile and protein-rich fish, usually found canned in water or oil.
Bread: The base of the sandwich; choose your favorite type, such as whole grain or sourdough.
Mayonnaise: Adds creaminess and binds the tuna mixture together.
Cheddar cheese: Provides a sharp, melty topping that complements the tuna.
Butter: Softened to spread easily on the bread for a crispy texture.
Dijon mustard: Adds a tangy flavor that enhances the overall taste.
Salt: Enhances the flavors of the other ingredients.
Pepper: Adds a hint of spice and depth to the tuna mixture.
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 your open-faced tuna melt sandwich a zesty kick and a subtle smokiness.
Suggested Side Dishes
Alternative Ingredients
1 can drained tuna - Substitute with canned salmon: Canned salmon provides a similar texture and flavor profile, making it a great alternative for a seafood-based sandwich.
1 can drained tuna - Substitute with chickpeas: Mashed chickpeas can mimic the texture of tuna and offer a plant-based protein option.
2 slices your choice bread - Substitute with whole grain bread: Whole grain bread adds more fiber and nutrients compared to white bread.
2 slices your choice bread - Substitute with gluten-free bread: For those with gluten intolerance, gluten-free bread is a suitable alternative.
¼ cup mayonnaise - Substitute with Greek yogurt: Greek yogurt provides a creamy texture with fewer calories and added protein.
¼ cup mayonnaise - Substitute with avocado: Mashed avocado offers a creamy consistency and healthy fats, making it a nutritious alternative.
¼ cup shredded cheddar cheese - Substitute with mozzarella cheese: Mozzarella melts well and has a mild flavor that complements the other ingredients.
¼ cup shredded cheddar cheese - Substitute with vegan cheese: For a dairy-free option, vegan cheese provides a similar texture and flavor.
1 tablespoon softened butter - Substitute with olive oil: Olive oil can be used to toast the bread, offering a healthier fat option.
1 tablespoon softened butter - Substitute with coconut oil: Coconut oil is another alternative that provides a unique flavor and is suitable for those avoiding dairy.
1 tablespoon dijon mustard - Substitute with yellow mustard: Yellow mustard has a milder flavor but can still provide the tanginess needed for the sandwich.
1 tablespoon dijon mustard - Substitute with honey mustard: Honey mustard adds a touch of sweetness along with the tang, offering a different flavor profile.
salt and pepper - Substitute with soy sauce: Soy sauce can add a savory umami flavor, reducing the need for additional salt.
salt and pepper - Substitute with lemon juice: Lemon juice adds a bright, acidic note that can enhance the flavors without adding extra salt.
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How to Store / Freeze This Recipe
- Allow the tuna melt sandwiches to cool completely before storing. This prevents condensation, which can make the bread soggy.
- Wrap each sandwich individually in plastic wrap or aluminum foil. This helps maintain freshness and prevents the sandwiches from sticking together.
- Place the wrapped sandwiches in an airtight container or a zip-top freezer bag. If using a freezer bag, remove as much air as possible before sealing.
- Label the container or bag with the date. This ensures you know how long the sandwiches have been stored.
- Store the sandwiches in the refrigerator if you plan to eat them within 2-3 days. For longer storage, place them in the freezer where they can last up to 1 month.
- When ready to eat, if refrigerated, reheat the sandwiches in a preheated oven at 350°F (175°C) for about 10 minutes or until heated through. If frozen, thaw in the refrigerator overnight before reheating.
- To maintain the crispiness of the bread, avoid reheating in the microwave as it can make the bread soggy. Instead, use an oven or a toaster oven for best results.
How to Reheat Leftovers
Preheat your oven to 350°F (175°C). Place the leftover tuna melt on a baking sheet and cover it loosely with aluminum foil to prevent the bread from getting too crispy. Bake for about 10 minutes, or until the cheese is melted and bubbly again.
For a quicker method, use a toaster oven. Set it to 350°F (175°C) and place the sandwich directly on the rack. Heat for 5-7 minutes, keeping an eye on it to ensure the cheese melts without burning.
If you prefer using a microwave, place the tuna melt on a microwave-safe plate. Cover it with a damp paper towel to keep the bread from drying out. Microwave on medium power for 1-2 minutes, checking to see if the cheese has melted.
For a stovetop method, heat a non-stick skillet over medium heat. Place the tuna melt in the skillet and cover with a lid. Heat for about 5 minutes, or until the cheese is melted and the bread is warm.
Best Tools for This Recipe
Oven: Used to bake the open-faced tuna melt sandwiches 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.
Spatula: Used to spread butter on the bread slices.
Can opener: Used to open the can of tuna.
Measuring cups: Used to measure the mayonnaise and shredded cheddar cheese.
Measuring spoons: Used to measure the dijon mustard.
Knife: Used to spread the tuna mixture evenly on the bread slices.
Oven mitts: Used to safely remove the baking sheet from the oven.
How to Save Time on This Recipe
Use pre-shredded cheese: Save time by using pre-shredded cheddar cheese instead of shredding it yourself.
Opt for pre-sliced bread: Choose pre-sliced bread to avoid the hassle of slicing it at home.
Mix in advance: Prepare the tuna mixture ahead of time and store it in the fridge until you're ready to assemble the sandwiches.
Use a toaster oven: A toaster oven preheats faster than a conventional oven, cutting down on waiting time.
Line the baking sheet: Use parchment paper on your baking sheet for easy cleanup.

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 Butter softened
- 1 tablespoon Dijon Mustard
- 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 slice of bread and place them on a baking sheet, buttered side down.
- Evenly distribute the tuna mixture on the bread slices.
- Top with shredded cheddar cheese.
- Bake in the preheated oven for about 5 minutes, or until the cheese is melted and bubbly.
- Serve immediately and enjoy!
Nutritional Value
Keywords
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