Place beets in a large pot, cover with water, and bring to a boil
Boil beets until fork tender – about 20 minutes
Remove from heat and drain. Since in cold water until cool enough to handle
Cut both stem and rot end off, and slip peelings from beets. They should slip right off, but if they’re not quite loose, use a paring knife to get them started
Pack beets loosely into canning jars – cutting them to fit if needed
Top with 1/2 teaspoon of salt per pint (one teaspoon per quart), and fill with fresh water leaving 1/2 inch of headspace
Screw down lids and bands, and place in prepared pressure canner
Heat pressure canner until steam escapes open valve
Let steam escape for 10 minutes, then close valve
Bring to 10lbs of pressure, and process for 30 minutes (quarts) or 25 minutes (pints)
Remove from heat and let return to zero pressure before opening lid
Let jars rest 24 hours before checking seals, then wash jars if needed, and store in a cool place out of direct sunlight