Top tuna with cheese, packing it on generously, and slide sandwiches under broiler. Broil until cheese melts and bubbles, 4-5 minutes. Remove tuna melts from broiler and serve immediately.
Debates about which fat is best for the grilled cheese and conflict over the ideal vehicle for tuna salad abound. Combine the two culinary concepts into a tuna melt and further dissent swirls.
This classic tuna melt can be made in a frying pan! If you like a little more texture to your toastie, it also works well with a tablespoon of finely diced celery folded through the filling.