Add the cut chicken to the slow cooker. Season with salt, pepper, dried oregano, dried basil, granulated garlic, fennel seed, and crushed red pepper flakes. Mix well to ensure all the chicken chunks are coated with the spices.
Pour the pizza sauce over the chicken, then stir to combine.
Sprinkle the grated Parmesan cheese evenly over the sauce-covered chicken.
Next, sprinkle the shredded mozzarella cheese on top.
Finish by topping with pepperoni or your favorite pizza toppings.
Cover and cook on low for 4-6 hours, or until the chicken is fully cooked and tender.
Allow the pizza chicken to cool for a few minutes before serving.
Serve the pizza chicken as is or over pasta or rice. Serve with a side salad for a complete meal. Enjoy!