01 -
Preheat the oven to 350°F and line a baking sheet with parchment paper.
02 -
Cut the 12-inch sub loaf into two 6-inch halves if preferred, then slice it widthwise to butterfly it, keeping it attached at the bottom.
03 -
Brush both sides of the butterflied loaf with the Italian dressing.
04 -
Evenly distribute the pepperoncini peppers and marinated roasted red peppers over each side of the loaf.
05 -
Layer the capicola, ham, salami, pepperoni, and Fontina cheese evenly on both halves of the loaf.
06 -
Sprinkle red pepper flakes over the layers to taste. Place the loaded loaf on the prepared baking sheet and bake for 10-13 minutes, or until the cheese is melted and the ingredients are heated through.
07 -
Remove the loaf from the oven, close the halves together, and slice each into portions if desired. Serve immediately.