Preheat your oven to 375°F (190°C).
Prepare the stuffing by mixing together the brie, diced apples, honey, thyme, salt, and pepper in a bowl.
Slice a pocket into each chicken breast by making a horizontal cut without going all the way through.
Stuff each chicken breast with the apple and brie mixture, ensuring they are filled but not overflowing.
Secure the openings with toothpicks or kitchen twine to keep the filling inside during cooking.
Heat olive oil in a large oven-safe skillet over medium-high heat.
Add the chicken to the skillet and sear for about 2-3 minutes on each side until golden brown.
Transfer the skillet to the preheated oven and bake for 20-25 minutes, or until the chicken is cooked through.
Remove the skillet from the oven and let the chicken rest for 5 minutes before serving.
Serve the stuffed chicken with your choice of sides, and enjoy!