Here is what I did: On Saturday afternoon, I removed all of the remaining large pieces of meat
from the carcass. I put the carcass, skin and bones, into a large crockpot and covered with purified water. I added some of the roasted onions and celery from the roasting pan, but you could add fresh onion and celery at this point if you have no roasted veggies. I left the crockpot on high, and simmered that carcass for 4 hours. I then removed it from the broth, let it cool, and divided it into two parts: Skin/meat/soft parts (aka Cat Food) and Bones (trash).
I strained the broth into another pot and put it into the refrigerator overnight. Sunday morning, I skimmed off the excess fat, added baby carrots and chopped celery and onions. Again the broth was brought to a boil, and then simmered over low heat (covered) until veggies were nearly soft. Last step was to bring to a boil again, add 2/3 cup frozen peas and 1/2 pkg (8 oz) wide egg noodles. Cook until noodles are done. Guaranteed to be the best turkey noodle soup you ever ate. 