Preheat the oven to 400°F and lightly grease a 9×13 inch baking dish with butter or cooking spray. Set aside.

Cut the chicken breasts in half horizontally to create four cutlets. Pound the thicker ends with a rolling pin so they’re all of even thickness.

In a large bowl, whisk 1 tablespoon of olive oil with minced garlic, Italian seasoning, salt and pepper. Add the chicken, toss to coat, then cover and chill in the fridge for 15-30 minutes.

Heat the remaining 1 tablespoon olive oil in a large skillet over medium heat. Add the spinach and cook, stirring frequently, until wilted, about 2-3 minutes. Set aside.

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In a medium bowl, beat the cream cheese until smooth. Add the wilted spinach, 1/2 cup mozzarella, and Parmesan (if using). Mix until smooth.

Take the chicken out of the marinade and let the excess drip off. If desired, sear the chicken in the skillet for 1-2 minutes per side. Then, arrange the meat in a single layer in the baking dish.

Spread the spinach and cream cheese mixture over the meat, then sprinkle the remaining mozzarella cheese over the top.

Bake for 20-30 minutes, until the chicken is cooked and the cheese is melted and lightly browned. Let stand for 5 minutes before serving. Enjoy!