Preheat your oven to 375°F (190°C).
In a bowl, mix together the mozzarella cheese, Parmesan cheese, ricotta cheese, minced garlic, dried basil, dried oregano, salt, and black pepper.
Cut a pocket into the side of each chicken breast.
Stuff each chicken breast with the cheese mixture and secure with toothpicks if necessary.
Heat the olive oil in a large oven-safe skillet over medium-high heat.
Sear the chicken breasts for 3-4 minutes on each side until golden brown.
Transfer the skillet to the oven and bake for 20-25 minutes, or until the chicken is cooked through.
Garnish with fresh basil leaves if desired and serve immediately.