Classic Italian Sub Sandwich

Name: Classic Italian Sub Sandwich
Ingredients: 1 large sub or hoagie roll , or demi Italian or French loaf (10 to 12 inches); 1 large plum tomato; 4 medium pickled pepperoncinis; 1 tablespoon mayonnaise; 2 ounces sliced prosciutto (about 5 slices); 2 ounces sliced Genoa salami or hot soppressata (about 10 ounces); 2 ounces sliced provolone cheese (about 3 slices); 1/2 cup shredded iceberg lettuce; 1 teaspoon olive oil; 1 teaspoon red wine vinegar; 1/4 teaspoon dried oregano; Kosher salt; Freshly ground black pepper