From his website:
"Chop up that carcass or pull it apart so that it fits into your biggest pot. Cover it with water, enough so it’s covered by an inch or so of water. Bring it to a simmer. Skim off anything that rises to the top that you wouldn’t want to eat if you saw it floating in a bowl of soup. Then, this is important, stick the pot in your oven at about 180 degrees F (or as close to that as possible). And forget about it for fours. Or five. Or six. As long as it’s not bubbling you’re good. It should not be bubbling, but it should be too hot for you to hold your hand against for more than an instant.
An hour before you want to take it out of the oven, add a couple carrots and a couple big Spanish onions, cut up, and continue cooking in the oven for another hour (if you have celery, parsely, thyme, garlic, bay, peppercorns, these are good to add as well, esp the thyme). Strain through a colander. Then, and this is important in my opinion, strain it through a kitchen cloth, cheese cloth if you have it, or any kind of cloth (I use ones that i can wash and reuse because I’m a cheapskate and hate to keep buying cheese cloth). Straining through cloth makes a huge difference (chinois won’t do it in my opinon). Now it’s ready to use or chill it and take the fat that congeals off the top."
http://ruhlman.com/2007/11/thanksgiving-th/
"Chop up that carcass or pull it apart so that it fits into your biggest pot. Cover it with water, enough so it’s covered by an inch or so of water. Bring it to a simmer. Skim off anything that rises to the top that you wouldn’t want to eat if you saw it floating in a bowl of soup. Then, this is important, stick the pot in your oven at about 180 degrees F (or as close to that as possible). And forget about it for fours. Or five. Or six. As long as it’s not bubbling you’re good. It should not be bubbling, but it should be too hot for you to hold your hand against for more than an instant.
An hour before you want to take it out of the oven, add a couple carrots and a couple big Spanish onions, cut up, and continue cooking in the oven for another hour (if you have celery, parsely, thyme, garlic, bay, peppercorns, these are good to add as well, esp the thyme). Strain through a colander. Then, and this is important in my opinion, strain it through a kitchen cloth, cheese cloth if you have it, or any kind of cloth (I use ones that i can wash and reuse because I’m a cheapskate and hate to keep buying cheese cloth). Straining through cloth makes a huge difference (chinois won’t do it in my opinon). Now it’s ready to use or chill it and take the fat that congeals off the top."
http://ruhlman.com/2007/11/thanksgiving-th/