INGREDIENTS
4 5 ounce cans
Solid white tuna
1/4 tsp
Oregano, dried
1/4 cup
Red onion
8
thin slices Tomato
1 tbsp
Lemon juice, freshly squeezed
5/16 cup
Mayonnaise
1 tsp
Black pepper, freshly ground
1/2 tsp
Salt
4
slices Rustic white bread or other dense white bread
4 oz
Provolone cheese