Chop up the berries, getting rid of the stems. Place the berries & sage together in a pot on the stove.

Add 1/4 sugar & pectin mix to the fruit, stir together, and let the mix come to a full rolling boil for sixty seconds. 

Add the remaining sugar, with heat on medium/low, let the mix come back to a full rolling boil. This took me about 20 minutes to reach! Once it gets there, let it boil for precisely one minute (science here), then remove from heat.

Pick out the sage leaves, then fill prepared (read: sanitized) jelly jars with the jam. Leave 1/4" head space. 

I like to use Weck jars because they are cute, place a clean & unused rubber ring onto the jar, top with a sanitized lid, and add the metal jar locks (do these have a real name?)...

Place into a large pot of boiling water for 15 minutes (adjust according to your elevation). You'll know your jam has set in a Weck jar when the tab of the rubber ring is pointing down.