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Ingredients
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Main Ingredients
Optional Ingredients
Method
Preparation
- 1
Drain the Tuna
Open the can of tuna and drain the liquid completely. Transfer the tuna to a mixing bowl.
- 2
Mix Tuna Ingredients
Add mayonnaise, Dijon mustard, salt, and black pepper to the drained tuna. Mix thoroughly until all ingredients are well combined.
Assembly
- 3
Layer Cheese and Tuna
Place a slice of provolone cheese on a plate. Spoon a generous amount of the tuna mixture over the cheese. If using, add lettuce, tomato slices, and red onion on top of the tuna.
- 4
Top with Cheese
Add another slice of provolone cheese on top of the tuna and optional vegetables.
- 5
Serve or Toast
You can serve this as an open-faced sandwich or toast the assembled sandwich in a pan for a few minutes until the cheese is melted and bubbly.
