Preheat oven to 350 degrees F. Lightly spray an oblong baking dish -OR- you can use a totally oven-safe skillet (in which the dish may be entirely cooked)
Butterfly the chicken breasts. Here's a video to show you how:
Mix the seasoned breadcrumb ingredients and place them on a plate; set aside.
Mix the stuffing ingredients, using only enough heavy cream to hold them together--they should not be wet.
Heat a large skillet over medium-high heat. Add the olive oil.
Place the 1/2 cup of cream on a plate. Coat the outer side only of the butterflied chicken breast with the cream, now dredge this coated side in the prepared crumbs. Place 1/4 of the filling on half of the uncoated side of the chicken. Fold the other half over the stuffing. Repeat with remaining chicken.
Brown chicken in oil in the hot skillet. If you are using an oven-safe skillet, you can pop this in the oven. If using the oblong baking dish, transfer browned chicken to the dish and place in the oven.
Bake for 25-35 minutes, or until chicken tests done by either an insta-read thermometer or juices run clear.