Lay a dry kitchen towel on the counter. Use the jar lifter to remove a jar from the canner. Drain the water back into the canner, and place on the towel. Keep the remaining jars in the canner so they stay hot.
Use the canning funnel and ladle to fill the jar with hot relish, leaving 1/2-inch headspace.
Wipe the rim to remove any residue, center a lid on the jar, and screw on a band until it is fingertip tight. Use the jar lifter to place the jar back into the canner, and repeat with the remaining jars.
Once all the jars are in canner, adjust the water level so it is two inches above the jar tops.
Cover the canner and bring to boil over high heat. Once water boils vigorously, continue boiling for 20 minutes at altitudes of less than 1,000 feet. Adjust processing time for your altitude if necessary (See Notes).
When processing time is complete, turn off the heat, and let the canner cool down and settle for about 5 minutes.
Spread a dry kitchen towel on the counter. Remove the cover by tilting lid away from you so that steam does not burn your face.
Use the jar lifter to remove the jars from canner and place on the towel. Keep the jars upright, and don't tighten bands or check the seals yet. Let sit undisturbed for 12 to 24-hours to cool.
After 12 to 24-hours, check to be sure jar lids have sealed by pushing on the center of the lid. The lid should not pop up. If the lid flexes up and down, it did not seal. Refrigerate jar and use up within a week.
Remove the screw on bands and wash the jars. Label, date, and store in a cool, dark place for 12 to 18 months. Allow at least 3 to 4 weeks for the salsa to develop its flavor. Once the jar is open, refrigerate and use up within a week. Yields about 6 pints.