Preheat your oven to 400°F (200°C).
Slice each chicken breast lengthwise, creating a pocket for the stuffing.
Stuff each chicken breast with slices of mozzarella cheese, cherry tomato halves, and fresh basil leaves.
Use toothpicks to secure the openings of the chicken breasts, ensuring the stuffing stays inside.
Place the stuffed chicken breasts in a baking dish.
Drizzle the olive oil over the chicken breasts, then sprinkle them with dried Italian seasoning, salt and pepper.
Bake in the preheated oven for 20-25 minutes or until the chicken is cooked through and the cheese is melted and bubbly.
Remove the toothpicks from the chicken breasts before serving.
Serve the caprese stuffed chicken with a side salad or steamed vegetables for a complete and satisfying low-carb, keto-friendly meal.