How to Make the PERFECT Tuna Melt

albacore tuna ((see notes above))

mayonnaise

dijon mustard

fresh lemon juice

kosher salt (to taste)

black pepper (to taste)

slices whole wheat bread ((or sourdough))

tomato slices (or to taste)

slices provolone cheese

slices sharp cheddar cheese ((or extra sharp))

butter (softened, to taste)