My nana’s recipe doesn’t give specifics, but you can treat this like you’re canning salsa. Put the lids onto the jars and screw until finger tight. Then submerge the jars in a large pot of water, fitted with a canning rack, that has been brought to a rolling boil. Ensure the jars are covered fully, with an inch of water above the tops of the jars. Place the lid on the pot and keep it at a boil for thirty minutes, then use tongs to remove the jars and place them on a tea towel. I leave them on the counter until I’m sure they’ve sealed properly—generally overnight. Sealed properly, they’ll keep in a cool, dark place for up to a year.