After six hours or so, turn heat off and allow broth to cool slightly. Pour broth through a mesh strainer and ladle into clean quart jars. Ingredients expand as they freeze, so be sure to leave a good 2-inches head space or the jar will crack open. Set open jars aside for a few hours to cool. Once they are only warm to the touch, seal, and place in the fridge to cool completely. After 1 day, set jars in the back of your freezer and start looking for some braising recipes.