Steps
Preheat your oven to 375°F (190°C).
In a bowl, mix together the cream cheese, mozzarella cheese, chopped spinach, minced garlic, salt, and pepper.
Carefully cut a pocket into the chicken breast and stuff it with the cheese and spinach mixture.
Heat the olive oil in a skillet over medium-high heat and sear the stuffed chicken breast for 3-4 minutes on each side until golden brown.
Transfer the chicken to a baking dish and bake in the preheated oven for 20-25 minutes, or until the chicken is cooked through.
Let it rest for a few minutes before slicing and serving.