Creating Apple and Brie Stuffed Chicken is straightforward if you follow these simple steps:

1. Preheat the Oven: Preheat your oven to 375°F (190°C).
2. Prepare the Chicken: Place the chicken breasts on a cutting board. Carefully slice each breast horizontally, creating a pocket for the stuffing. Be careful not to cut all the way through.
3. Make the Filling: In a bowl, combine the diced apple, Brie cheese, fresh thyme, salt, and pepper. Mix well to combine all ingredients.
4. Stuff the Chicken: Spoon the apple and Brie filling into each chicken breast pocket. Secure with toothpicks if necessary to keep the filling inside.
5. Sear the Chicken: In an oven-safe skillet, heat the olive oil over medium-high heat. Add the stuffed chicken breasts and sear for 3-4 minutes on each side until golden brown.
6. Deglaze the Pan: Add the chicken broth to the skillet, scraping up any browned bits from the bottom. For added flavor, stir in Dijon mustard and honey, if using.
7. Bake: Transfer the skillet to the preheated oven and bake for 25-30 minutes, or until the chicken is cooked through and reaches an internal temperature of 165°F (74°C).
8. Rest the Chicken: Once baked, remove the chicken from the oven and let it rest for 5 minutes before serving. This allows the juices to redistribute for maximum flavor.
9. Serve: Slice the chicken to reveal the delightful stuffing and plate it beautifully.

These steps will guide you in creating this incredible stuffed chicken effortlessly.