I have a great recipe of my Mother's that i make cases of for gifts and family. Okay....I have to admit that we probably broke rules for years! Our jars are hot...our lids are hot...and the salsa is boiling(simmering?)...We filled the jars and sealed. We did make certain they sealed (lots of little pop sounds). Never did pressure or water bath. It always kept well. Of course, it was usually eaten very quickly!