Preheat your oven to 350F and line your sheet pan with parchment paper.
Slice your mozzarella cheese and tomatoes. Drizzle a little of olive oil over it.
Slice your chicken breasts in half so that you have four thin breasts. Carefully place your hand on top of the breast to apply a little pressure while you cut, this will help keep your knife straight and even so you get four even thin chicken breasts.
Lay your chicken breasts on your parchment paper. You will want at least an inch or so between each. Sprinkle ½ of your Italian Seasoning (1 TBSP) on top of each chicken breast.
Layer your cheese (1 slice), tomatoes (1-2 slices) and basil (3 leaves) inside of your chicken breasts on one end so that you can fold over the other side like a book. (If you want to secure your fold, you can stick in a tooth pick through to keep it from possibly sliding off.)Sprinkle the remainder of the Italian seasoning and salt on top of each chicken breasts.
(Optional) Add on your cherry tomatoes and lightly drizzle the pan with olive oil.
Bake at 350F for 15-17 minutes until the chicken is cooked through and your cheese is melted. Garnish with fresh basil leaves.