In a small bowl or mason jar, whisk together the olive oil, red wine vinegar, pepperoncini pepper juice, oregano, salt, and black pepper.
On a large cutting board, chop the romaine lettuce, cherry tomatoes, pepperoncini peppers, and black olives into small bite-sized pieces.
Stack the deli meats and provolone cheese, then chop into thin strips and smaller pieces.
In a large mixing bowl, add the chopped vegetables, meats, cheeses, parmesan cheese, and dressing. Toss until evenly coated.
Pile the chopped filling into hoagie buns, toasted gluten free bread, or lettuce wraps and serve immediately.
Notes
Note 1: Use a savory ham. Skip the brown sugar or honey ham options because the sweetness does not work with the Italian flavors. Note 2: Same as the ham, skip any sweet flavors for the turkey. Note 3: For low FODMAPers, use a salami without garlic or onion. Note 4: Same as the salami, use a pepperoni without garlic or onion. Meal Prep Instructions: Complete all steps but the last step. Store the sandwich filling in an airtight container, separate from the bread option. When ready to eat, assemble the sandwich.