Preheat the oven to 425 degrees Fahrenheit and then cook the sausage in a 10-inch skillet. Cook for around 5-7 minutes until no longer pink, drain the fat, and place in a small bowl.
Next, add the bell pepper, onion, and mushrooms to the same pan you cooked the sausage in. Cook for three to five minutes, until the vegetables, are softened and browned. Feel free to leave out any of these vegetables or add your own mix.
Remove the vegetables from the heat and add in the garlic and pepper flakes. Then, stir in the sausage and sauce with the vegetable mixture.
Using either homemade or store-bought, cut the rolled pie crust into four wedged shape pieces, for a total of eight pieces. Fill the wedges with the sausage and vegetable mixture, leaving a border of half an inch. Sprinkle two tablespoons of mozzarella cheese into each pocket.
Fold the unfilled side of the wedges over the pizza filling then use a fork to press the edges to seal. Transfer the pockets to your baking sheet and brush with melted butter. Then, sprinkle on the parmesan cheese and Italian seasonings.
Bake the pockets for 13 to 15 minutes, until the pie crust is golden brown. Then, allow them to cool for 10 minutes before serving for lunch or dinner.