1 Italian or French baguette, cut for 2 (6 to 8-inch-long) sections, then split lengthwise but attached on one side
dressing
1 tablespoon red wine vinegar
1 tablespoon dried oregano
1/4 teaspoon Kosher salt
1/4 teaspoon ground pepper
1 tablespoon extra-virgin olive oil
alternative dressing
mustard and/or mayonnaise
4 red onion slices, thin and rinsed
2 ounces sliced provolone and/or low-moisture mozzarella cheese
1/2 pound thinly sliced Italian cured meats, such as salami, prosciutto, mortadella, coppa, and soppressata
1/2 cup pickled peppers, like pepperoncini, banana peppers, or giardiniera, sliced
1/2 pound head iceberg lettuce, grated coarsely
1/2 ripe tomato, thinly sliced