Preheat oven to 425°F
In one bowl, mix together mozzarella cheese, spinach, sun-dried tomatoes, garlic, seasoning, salt, and pepper.
In another bowl, place breadcrumbs. In the last bowl, add the juice of one lemon and olive oil.
On a cutting board, use a boning knife to create a pocket for the stuffing. Cut slit lengthwise 3/4 of the way through without cutting all the way through.
Spread the mozzarella cheese, spinach and sun-dried tomato mixture evenly on one side of each chicken breast.
Fold each chicken breast in half and secure with toothpicks.
Dip each breast into the lemon oil mixture, then coat it with the breadcrumb , transferring them to a cast iron skillet coated with olive oil spray.
Then lightly spray the olive oil over the top of the chicken breasts. Bake at 425˚F for 25 minutes or until the internal temperature registers at 165˚F. Rest chicken 5 minutes. Pull out toothpicks. Enjoy!