Creating your own version of Costco Chicken Bake can be effortless if you follow these clear steps:

1. Preheat Oven: Preheat your oven to 375°F (190°C) and line a baking sheet with parchment paper.

2. Mix Ingredients: In a large bowl, combine shredded chicken, mozzarella cheese, cheddar cheese, ranch dressing, garlic powder, green onions, salt, and pepper. Mix until well incorporated.

3. Prepare Dough: On a floured surface, roll out the pizza dough into a rectangle approximately 1/4 inch thick.

4. Add Filling: Spoon the chicken mixture evenly down the center of the rolled dough, forming a line.

5. Fold Dough: Fold the dough over the filling, pinching the edges to seal it tightly.

6. Place on Sheet: Carefully place the sealed dough seam-side down on the prepared baking sheet.

7. Bake: Bake in the preheated oven for 25-30 minutes, or until the crust is golden brown.

8. Cool and Slice: Remove from the oven and let it cool for a few minutes before slicing into portions.

9. Serve: Enjoy warm, perhaps with a side of fresh salad or your favorite dipping sauce.