Step 1: Prepare the Dough

Preheat the oven to 400°F (200°C) and line a baking sheet with parchment paper.

In a mixing bowl, combine the cooked, shredded chicken breast, egg, Parmesan cheese, oregano, salt, and pepper.

Mix the ingredients thoroughly until they form a cohesive dough-like mixture.

Step 2: Shape the Crust

Transfer the chicken mixture to the prepared baking sheet.

Using your hands, press and shape the mixture into a circular pizza crust, about 1/4 inch thick.

Step 3: Pre-Bake the Crust

Place the crust in the preheated oven and bake for 20-25 minutes, or until golden and slightly crispy.

Step 4: Add the Toppings

Remove the pre-baked crust from the oven.

Evenly sprinkle the shredded mozzarella cheese over the crust.

Add the sliced black olives, diced red pepper, and sliced mushrooms.

Place extra slices of cooked chicken breast on top.

Step 5: Bake the Pizza

Return the pizza to the oven and bake for an additional 10-15 minutes, or until the cheese is melted and bubbly.

Remove from the oven, let cool slightly, and serve hot. Enjoy your chicken crust pizza!