How do you butterfly a chicken breast without it falling apart?
Place the breast flat on a cutting board, place your hand on top to steady it, and use a sharp knife to cut horizontally through the thickest part, stopping just before the edge so it opens like a book. Keep the knife parallel to the board for even thickness.
Can you make this ahead of time?
Yes. Stuff and bread the chicken breasts up to 4 hours ahead, refrigerate on a parchment-lined tray, then pan-fry and bake when ready to serve.
How do you know when the chicken is fully cooked?
Use an instant-read thermometer inserted into the thickest part of the chicken; it should reach 165°F (74°C). The chicken should no longer be pink inside when cut open.
Can you substitute the white cheddar cheese?
Yes. Provolone, mozzarella, or fontina work well and complement the pepperoni and pepperoncini flavors.
What's the purpose of finishing in the oven after pan-frying?
Pan-frying creates a golden, crispy exterior, while the oven gently finishes cooking the thick chicken breast through without drying out the coating.