You spent the time to make delicious gravy to top off a fabulous meal. Now there’s leftover gravy. What to do? Freeze it in ice cube trays, says Marie Gallashaw of Tinton Falls, N.J. “When it’s frozen, put the gravy cubes in a plastic bag. It takes up less space, and when you need a little gravy for a potato or anything you can take out what you need.