Preheat your oven to 375.

If you did not buy already thin cut chicken breasts, flatten your chicken breasts out. You can do this by using a mallet, or simply by pressing gently but firmly with your hand. Work slowly, so as to not tear the meat.

In each chicken breast, put ¼ of the broccoli and pesto, and wrap the chicken around them, placing them seam side down in an oven safe skillet or baking dish.

You can use a toothpick if you'd like to hold the chicken together, however mine stuck together just fine by putting the seam side on the bottom of the dish.

Cover the 4 chicken breasts with marinara sauce, and top with cheese.

Bake for 25-30 minutes, or until cooked through.