01 - Preheat the oven to 400°F.
02 - Using a sharp knife, cut a pocket into the side of each chicken breast without cutting completely through.
03 - Drizzle olive oil over the chicken breasts and season evenly with salt, black pepper, and dried Italian seasoning on both sides.
04 - Fill each chicken breast with 2 to 3 slices of mozzarella, several slices of tomato, and 4 basil leaves. Secure with toothpicks if necessary.
05 - Heat a large oven-safe skillet over medium-high heat and sear the stuffed breasts for 2 to 3 minutes per side until golden brown.
06 - Transfer the skillet to the oven and bake for 18 to 22 minutes until the chicken is fully cooked and cheese is melted.
07 - Combine balsamic vinegar and honey in a small saucepan; simmer over medium heat, stirring occasionally, until reduced by half and syrupy, about 8 to 10 minutes.
08 - Remove toothpicks from the chicken and drizzle with the prepared balsamic glaze before serving.