A grinder sandwich, also known as a toasted hoagie or sub, is a popular Italian-American sandwich made with a long crusty roll filled with various meats, cheeses, and vegetables. The signature grinder salad, made with shredded lettuce, chopped vegetables, vinegar, and spices, adds a zesty kick to the sandwich.
In a mixing bowl combine mayo, vinegar, oregano, and pepperocinis. Add lettuce, red onion, and parmesan and toss together until evenly coated.
Preheat oven to 350˚F. Place a slice of cheese onto each side of the bread roll and bake for 4 to 5 minutes, until the cheese just melts. Remove from oven and sprinkle each side with dried oregano. Top bottom half of roll with mortadella (or ham) and top half of the roll with soppressata and salami.
Top capicola with peppers, if using. Top cherry peppers with iceberg salad, then sliced tomatoes.
Carefully, but tightly press the sandwich roll together, slice in half and serve.