Preheat oven to 450F
Cut butterflied breasts almost in half, leaving approx. 1 inch (2.5 cm) at edge, and open like a book.
Divide 2 stuffing between 2 breasts. Fold meat over to enclose stuffing and roll up, using skewers, or twine to hold breasts together.
Brush with glaze and season with salt and pepper.
Place breasts on bed of onion and celery in roasting pan, and bake for 10 minutes, until skin begins browning.
Reduce oven temp to 350F (180C), and roast another 45 to 50 minutes or juices run clear. Internal temp should be 165F (75C)
Let sit for 15 minutes, then slice, using remainder of glaze as a sauce (if desired)
Enjoy!