Ciabatta Grinder Salad Sandwich

Grinder Filling:

• 2 ciabatta rolls, sliced in half
• 5 thin slices provolone cheese
• 4 thin slices deli turkey
• 4 thin slices deli ham
• 4 thin slices soppressata
• 4 thin slices prosciutto
• 16 slices mini pepperoni
• ¼ cup grated Parmesan cheese, or to taste
• 1 medium tomato, thinly sliced
• 1 drizzle olive oil, or to taste
• salt and freshly ground black pepper to taste

Grinder Salad:

• ½ cup mayonnaise
• 1 teaspoon red wine vinegar, or more to taste
• 1 clove garlic, grated
• 1 teaspoon dried oregano
• ⅛ teaspoon salt
• ⅛ teaspoon ground black pepper
• 1 pinch red pepper flakes, or to taste
• ¼ head iceberg lettuce, shredded
• ½ medium red onion, thinly sliced
• ¼ cup sliced pepperoncini peppers, drained