Chioggia beets are an heirloom variety originally from Italy. They can be found in farmers markets or specialty grocery stores. They are small and the insides consist of red and white rings. You can substitute any small beet for this recipe. This one also calls for a vacuum sealer, but if you do not have one, you can get the same effect with any resealable bag. Just be sure to squeeze out as much air as possible. Recipe adapted from Thomas Keller, LA Times.