Using a sharp knife butterfly the chicken breasts: Place hand on top of chicken and hold chicken firmly to the cutting board. Slice chicken breast down the middle without cutting completely through.
Open chicken and spread 2 tbs of sauce, layer with cheese and peperoni.
Roll and secure with a toothpick
Place on prepared baking sheet and cover with remaining sauce
Bake 35 minutes remove from oven and sprinkle with shredded cheese. Place back in oven and cook for another 10 minutes or until the chicken is 160 degrees