In a medium bowl, drain the canned tuna thoroughly, ensuring no moisture remains. Add mayonnaise, shredded cheese, and freshly chopped herbs. Mix until creamy.

Take two slices of bread and spread the tuna mixture generously between them.

Preheat a skillet over medium-low heat, adding a pat of butter to coat.

Place the sandwich in the skillet and grill for 3–4 minutes, until golden brown.

Flip the sandwich and grill the other side for another 3–4 minutes until the cheese melts.

Remove from skillet, slice in half, and serve hot.