Steps
1. Preheat the oven to 350°F.
2. Mix the olive oil, balsamic vinegar, salt, and pepper to create a vinaigrette.
3. Place the bread slices on a baking sheet.
4. Place the mozzarella cheese on one of the slices of bread.
5. Top with the salami and pepperoni.
6. Add the tomato slices and chopped olives.
7. Drizzle the prepared vinaigrette over the sandwich.
8. Top with the second piece of bread.
9. Bake in the preheated oven for 10 minutes.
10. Slice in half and serve.