In a medium skillet, heat the pan over medium-high heat and add the ground Italian sausage. Cook for about 8 minutes until browned, then remove from heat and set aside.

Cut the wonton wrappers diagonally into triangles. Heat about 1 inch of vegetable or canola oil in a separate pan over medium-high heat. Add the wonton triangles in small batches, frying for about 2 minutes on each side until golden and crispy.

Preheat your oven to 375°F (190°C). On a baking sheet, layer the crispy wonton chips, then distribute the cooked sausage, pepperoni, and pepperoncini. Top with shredded pepper jack and mozzarella cheeses.

Bake in the preheated oven for about 5 minutes, or until the cheese is melted and bubbling. Monitor to prevent the chips from browning too much.

Let the nachos cool for a minute before serving with marinara sauce for dipping.