Heat the olive oil in a large skillet over medium heat.
Add the chicken breast to the skillet and season with salt, pepper, garlic powder, and onion powder.
Cook the chicken for about 6-7 minutes per side until golden brown and fully cooked. Remove and chop into bite-sized pieces.
In the same skillet, add the broccoli and sauté for about 3 minutes until slightly tender.
Sprinkle the flour over the broccoli and stir, cooking for an additional minute to remove the raw flour taste.
Gradually whisk in the chicken broth and then the heavy cream, stirring continuously until the mixture thickens.
Stir in the shredded cheddar cheese until melted and well incorporated into the mixture.
Fold the chopped chicken into the skillet, mixing well to combine all ingredients.
Pour the filling into a pie dish (or keep it in the skillet) and cover with the pre-made pie crust.
Cut slits in the crust to allow steam to escape, and place the skillet or pie dish in a preheated oven at 400°F for about 25 minutes or until the crust is golden and flaky.
Once done, remove from oven and allow to cool slightly before serving.