I've been making homemade chicken soup for years and I make my broth from scratch. It tastes so much better than canned broth. And it's so easy when you use a prepared rotiserrie chicken from the deli.
The "bone broth" craze is all the rage, and this recipe is just that - bone broth.
Recipe: remove all of the meat from the chicken, don't worry about getting every little bit because scraps of meat will add flavor. Save the meat for other recipes. Place the carcass in a stock pot and cover it with cold water. Add onions, celery, parsley and peppercorns. Bring it to a boil, then reduce the heat and simmer all day, or at least 4 hours. I do not add salt to the recipe because it is too easy to oversalt and ruin it. I add salt to the recipe when I use the broth.
Pour the prepared broth through a colander into a mason jar. Discard the bones and veggies. Keep your broth in the refrigerator and use it up within a week.