At-Home Italian Sub Sandwich

Ingredients

• 1 loaf (1 pound) unsliced Italian bread
• 2 to 3 tablespoons olive oil
• 2 to 4 tablespoons shredded Parmesan cheese
• 1 to 1-1/2 teaspoons dried oregano
• 1 medium tomato, thinly sliced
• 1/2 pound thinly sliced deli ham
• 1/4 pound sliced provolone cheese
• 1/4 pound thinly sliced hard salami