Let’s dive into creating this delightful dish. Remember, cooking is as much about enjoying the process as it is about the final product.

1. Preheat your oven to 375°F (190°C). Line a baking sheet with parchment paper or lightly grease it with olive oil.
2. In a medium bowl, mix together the chopped spinach, artichoke hearts, cream cheese, mozzarella cheese, Parmesan cheese, garlic powder, onion powder, salt, and pepper until well combined.
3. Using a sharp knife, carefully cut a pocket into each chicken breast. Be sure not to cut all the way through.
4. Stuff each chicken breast with the spinach and artichoke mixture, pressing the edges to seal. You can use toothpicks to secure if necessary.
5. Heat the olive oil in a large skillet over medium-high heat. Sear each stuffed chicken breast for 2-3 minutes on each side, until golden brown.
6. Transfer the chicken breasts to the prepared baking sheet. Bake in the preheated oven for 20-25 minutes, or until the chicken is cooked through and the juices run clear.
7. Remove from the oven and let rest for a few minutes before serving. Garnish with fresh parsley if desired.