Preheat the oven to 375°F (190°C).
In a mixing bowl, combine the diced apple, brie cheese, and fresh thyme.
Using a sharp knife, cut a pocket into each chicken breast.
Stuff each chicken breast with the apple and brie mixture.
Season each stuffed chicken breast with salt and pepper.
Heat olive oil in a large oven-safe skillet over medium-high heat.
Sear the chicken for 4-5 minutes on each side until golden brown.
Pour the chicken broth into the skillet and transfer it to the oven.
Bake for 25-30 minutes or until the chicken reaches an internal temperature of 165°F (74°C).
Let the chicken rest for 5-10 minutes before serving.
