Caramelized Mushrooms, Onions and Pepper Filling

1. In a medium skillet under medium-high heat, heat up 1 tablespoon of olive oil before adding in the mushrooms. Cook the mushrooms while stirring for 1-2 minutes or until it starts to sweat.
2. Season with salt and pepper to taste and continue to cook the mushrooms stirring intermittently until it becomes caramelized, about 6-8 minutes. Transfer the caramelized mushrooms to a shallow dish to cool to room temperature.
3. In the same skillet, heat up the remaining olive oil before adding the onions and peppers. Cook the onions and peppers, stirring for 1-2 minutes or until it starts to sweat. Mix in the garlic and season with salt and pepper to taste.
4. Continue to cook the veggies stirring intermittently until it becomes caramelized, about 8-10 minutes. Remove from heat and cool to room temperature. If onions and peppers start to dry out before it is fully caramelized, deglaze the pan with 1 tablespoon of water at a time to rehydrate the veggies as needed.

Calzone Assembly

1. Preheat the oven to 400F(200C). Line a large baking pan with parchment paper.
2. In a large mixing bowl, mix together the mozzarella and sharp cheddar cheese. In a small mixing bowl, whisk to combine the egg and water. Set aside.
3. Divide the dough into 3 equal pieces. Working with one piece of dough at a time, roll the dough into an 8 inch circle on a lightly floured countertop or work surface.
4. Evenly sprinkle 6 tablespoons of the cheese mixture over the bottom half of the dough and top with a 1/3 of the caramelized onion and peppers.
5. Next, sprinkle 6 tablespoons of the cheese mixture over the onions and peppers before topping with a 1/3 of the caramelized mushrooms and some fresh parsley.
6. Fold the top half of the dough over the filling and crimp the edges together to seal shut. Using a sharp knife, make three slits on top of the calzone and transfer to the parchment lined baking sheet.
7. With a pastry brush, apply some of the egg wash over the entire surface of the calzone and sprinkle with some Italian seasoning. Repeat this process with the remaining dough pieces and fillings for a total of 3 calzones.
8. Bake the calzones for 30-32 minutes or until they appear a rich golden brown color. Allow the calzones to cool for 10-12 minutes before serving as is or with a sauce of choice like marinara or pizza sauce.