A toasted Italian sub loaded with cured meats, provolone, and crisp vegetables is a high protein deli masterpiece. This family-sized sandwich is perfect for sharing or meal prep.
Preheat your oven to 375°F. Line a baking sheet with parchment paper to prevent sticking.
Slice the Italian hoagie roll lengthwise, keeping it attached at the hinge, and arrange on the baking sheet.
Layer the Genoa salami, ham, pepperoni, and provolone cheese evenly inside the roll, ensuring every bite gets all meats and cheese.
Bake the sandwich open-faced for 8–10 minutes, until the cheese melts and the edges of the roll are lightly crisp. Watch closely to avoid burning.
Remove from the oven, then top with shredded iceberg lettuce, tomato slices, and sliced red onion.
Drizzle olive oil and red wine vinegar over the vegetables, then sprinkle dried oregano, salt, and black pepper. Close the sandwich and slice into 4 portions for serving.