tuna sandwich: Garden Tuna Checkerboard Sandwiches Although all these sandwiches contain the same lemon–white wine vinegar tuna salad, their breads are different. Have a little fun and arrange them in a checkerboard pattern to keep people guessing.
Approaching tuna-melt perfection, Tommy Habetz's sandwiches have the ideal tuna-to-cheese ratio. His smart idea: using balsamic vinaigrette in place of mayonnaise. More Fantastic Sandwiches - Oregon Tuna Melts
Fresh-Turn Melts with Avocado. I skip the pickle and add extra celery. Pan-fry tuna separate, then lightly pan-fry veggies, add tuna/mayo and pan fry a little more before adding the cheese & melting in the oven.