There are all kinds of different ways to make broth, in the oven or on the stovetop, a pressure cooker or a slow process. I use a crock pot.
That's such a delicious-sounding recipe.
I also use a crockpot to make the chicken stock overnight. When chilled it sets up so firm that you actually can cut it with a knife. I freeze it in that concentrated state and dilute it if I'm cooking rice because there's so much gelatin that the rice can't absorb it.