In a mixing bowl, combine softened cream cheese, grated Parmesan, shredded mozzarella, minced garlic, spinach, and 1 tsp salt. Mix until well combined.
Place the stuffed pork chops in a greased baking dish. Bake in the preheated oven for about 25-30 minutes, or until the pork reaches an internal temperature of 145°F (63°C).