Preheat Oven To 375 Degrees F. Place Chicken On Cutting Board. Holding Sharp Knife Horizontal To Board, Cut A 3-Inch Deep Pocket Lengthwise In The Thick Side Of Each Breast. Place 2 Basil Leaves On Each Slice Of Mozzarella, Then Sprinkle With Salt And Pepper. Stuff Each Breast Pocket With A Cheese Bundle. Wrap 2 Slices Prosciutto Around Each Breast, Anchoring With Toothpicks. Heat Oil In Large Oven-Proof Nonstick Skillet Over Medium-High. Add Chicken And Cook About 3 Minutes On Each Side Or Until Browned. Transfer Chicken In Skillet To Oven; Bake 12 Minutes Or Until Done (Internal Temp 170 Degrees F).