Hubby loves this. I like it. Very easy though, so I’ll make it for him when he asks for it. I bet this would be really good with some green chiles in it too. I think I’ll try that next time.
Mix mayo and tuna in a small bowl. Butter one side each of the bread. Spread tuna mixture on 2 slices of the bread, unbuttered side. Top with cheese (and green chiles, etc). Place remaining bread slices on top, buttered side up. Place on hot griddle, cook until bread is golden on both sides.