In a large mixing bowl, combine one can of drained tuna, 4 ounces of cream cheese, 1 cup of sharp cheddar cheese, and diced jalapeños to taste. Add 2 tablespoons of mayonnaise and optional chopped celery for crunch. Mix everything together until well combined.

Store the flavorful filling in an airtight container in the refrigerator for 2-3 days.

Preheat your oven or air fryer to 400°F. Take slices of your chosen bread and spread a generous layer of the tuna filling on each slice.

Sprinkle additional sharp cheddar cheese over the top. Add more jalapeños for extra heat.

Place the assembled melts in your preheated oven or air fryer. Bake for 7-9 minutes until cheese is bubbly and bread is golden brown.

Optional: switch your oven to broil for an additional 2-3 minutes for a crispy layer.

Let the melts cool slightly and serve warm alongside fresh veggies like carrot sticks.