Pizza Pot Pie

Name: Pizza Pot Pie
Cuisine: European, Italian, Mediterranean
Ingredients: 2 cups shredded mozzarella cheese; 1 tsp dry oregano; 3/4 lb Italian sausage; 250g cream cheese; 1 cup cherry tomatoes, halved; 1/2 red onion, diced; 1/2 cup sweet bell pepper, diced; 18 slices pepperoni; 2 tbsps sliced black olives; pie dough for 2 crust 9" pie; 1 egg and 1 tsp water for egg wash; 9" cast iron pan