Name: Grilled TUNA Sandwich (with SOURDOUGH and MUENSTER Cheese)
Prep time: 5 min
Cook time: 10 min
Total time: 15 min
Ingredients: 2 (5 oz) cans of tuna (4 oz drained); 3 tbsp mayo; 2 tbsp sour cream; 1/2 tsp onion powder; 1/8 tsp cayenne pepper; 1 tsp sugar; 6 -8 slices Sourdough bread; 4 tbsp butter (softened); 6 - 8 slices Muenster cheese; salt and pepper (to taste); tomato and onion slices (optional)

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This grilled tuna sandwich is a savory grilled cheese version of deliciousness! I hope you try it! Sourdough bread, Muenster cheese, and a creamy tuna filling sizzled up on a cast iron skillet. Any non-stick skillet or pan will also work. This sandwich is fast and easy to make. With the Muenster cheese and protein-packed tuna, you will fill up quickly. The creamy tuna filling has mayo and sour cream with a mild touch of spicy-sweet seasonings.

three grilled tuna cheese sandwiches stacked on black plate

For years I made open-faced tuna melts in the oven with cheddar or American cheese and a tomato slice on top. (You can also add a slice of onion and/or tomato to this sandwich as well.) This recipe takes the average tuna melt up a few notches and my husband tells me it is restaurant quality! This grilled tuna sandwich was created at Living Homeward and inspired by my smoked tuna dip recipe HERE.

four grilled tuna sandwhiches laying on a large black plate

How to make a Grilled Tuna Sandwich

Gather your ingredients and drain the tuna.

Mix the tuna with sour cream, mayo, onion powder, cayenne pepper, sugar, and salt.

blue bowl with sour cream, mayo, tuna, cayenne, onion powder, and salt and pepper on a white counter

Heat the skillet or pan to medium-low heat. (If the skillet is too hot it will fry the bread too fast and the cheese will not have enough time to melt nor the filling enough time to warm.) Butter 2 slices of bread on one side only.

blue bowl with sour cream, mayo, tuna, cayenne, onion powder, and salt and pepper mixed together

When the pan sizzles with a drop of water, add one slice of bread, buttered side down, onto the hot skillet. Add one slice of cheese and a spoonful of the tuna mixture. (The sandwiches below were 3 inches wide each and filled with 3-4 tablespoons of the tuna mixture and made 3 sandwiches in total.) Optional.…at this point, you can add a tomato slice and/or a slice of onion on top of the tuna. Then add a second slice of cheese and top with the other slice of bread, buttered side facing outward.

grilled tuna sandwich cooking on a cast iron skillet

two golden brown grilled tuna sandwiches cooking on a cast iron skillet

Allow to cook until the bread is a deep golden color and flip the sandwich carefully to the other side. When the other side is also a deep golden color transfer to a plate and enjoy!

three grilled tuna fish sandwiches stacked on a black plate

Thoughts on Sourdough Bread for a Grilled Tuna Sandwich

Any sourdough bread will do. I bought mine in the bakery section of the grocery store but you can find some sourdough in the bread aisle as well. The slices can be rather wide….the sourdough bread pictured here came as a 6-inch loaf. I cut the slices in half, each sandwich was about 3 inches wide. If you are interested in making homemade sourdough here is a great reference for a Sourdough Starter and a Sourdough Bread recipe.

Let me know below if you enjoyed this tuna sandwich!

Check out more TUNA recipes here…..

Creamy Tuna Pasta (made in ONE pot)

The BEST Smoked TUNA Dip (baked with cream cheese)

Easy SMOKED Tuna DIP (10 min or less)

“If you can’t feed a hundred people, then feed just one.”

– Mother Teresa

Grilled TUNA Sandwich (with SOURDOUGH and MUENSTER Cheese)

This tuna melt is a savory grilled cheese version of tuna deliciousness! Fast and easy to make. You can add slices of onion and/or tomato. The protein from the tuna will fill you up and the creamy base will satisfy your taste buds!

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Prep Time 5

Cook Time 10

Total Time 15

Servings 3

Ingredients

2 (5 oz) cans of tuna 4 oz drained
3 tbsp mayo
2 tbsp sour cream
1/2 tsp onion powder
1/8 tsp cayenne pepper
1 tsp sugar
6 -8 slices Sourdough bread
4 tbsp butter softened
6 – 8 slices Muenster cheese
salt and pepper to taste
tomato and onion slices optional

Instructions

Drain the tuna and combine it with the mayo, sour cream, sugar, cayenne, onion powder, and salt and pepper.
Heat the skillet to medium or medium-low heat. (If the skillet is too hot it will fry the bread too fast and the cheese will not have enough time to melt nor the filling enough time to warm.) Butter bread slices on one side only.
When the pan sizzles with a drop of water, add one slice of bread, buttered side down, onto the skillet. Add one slice of cheese on top of the bread. Then a spoonful of the tuna mixture (about 3-4 tbsp of tuna for each sandwich). Optional.…you can add a tomato slice and/or a slice of onion on top of the tuna.
Next add a second slice of cheese and top with the other slice of bread, buttered side facing outward.
Allow to cook until the bread is a deep golden color and flip the sandwich carefully to the other side. When the other side is done transfer to a plate and enjoy!

Notes

I used a cast iron skillet but any non-stick skillet or pan will work.

You can find sourdough bread in the bread aisle or the bakery section of the grocery store. I usually get a loaf from the bakery with slices that are 6 inches wide. I cut the slices in half to 3 inches so that the sandwiches are closer to the standard sandwich size.