This is the stock base for the gravy I made to accompany the smoked turkey for Thanksgiving.
I used the necks, livers, hearts and gizzards from three birds raised on the farm, covered them with water and added some onions, garlic, celery, carrots, and two bay leaves. I strained the stock after 8 hours simmering on the stove and added some dried portabellas (reconstituted, strained, and chopped fine in a blender), and the mushroom water. I pulled the meat from the necks, smooshed up one of the livers and added them back to the stock. I let it cool overnight so that any fat could be removed.
Rice flour roux doesn't behave exactly as wheat flour does, it takes some time to thicken the stock. This is only the second time I have used it.