Preheat oven to 350℉.
Cut the onions into quarters, then slice each quarter in half.
Smash each garlic clove with the side of a knife.
Cut the heads of celery and carrots into 3-4inch chunks.
4 large Carrots
2 heads Celery
Put the onion, garlic, celery and carrots into a roasting pan.
Place the whole chickens, wings and drumsticks on top of the vegetables.
2 whole Chickens
10 Chicken Wings
10 Chicken Drumsticks
Cut the head off a bunch of parsley and place in the pan.
Sprinkle with the peppercorns.
Roast for 3-4 hours or until the chicken skin appears to be golden. At this point, the meat should be overcooked, the bones brittle, and there should be a noticeably large amount of juices in the bottom of the pan.