Sexy Blackberry Jam (from 3 ingredients)

Surprisingly beautiful blackberry jam. No pectin; just three ingredients, and not too much sugar either.  It is cooked to 200+ degrees to make the sugar set the jam. The result is plump with nice pieces of blackberry.  These will be awesome to pull out in December; I already know they're delicious on brioche challah bread!
This is a super small batch- enough with even a modest blackberry picking.  Mine made almost 3 half pints.  Since I don't go through much jam at a time, I canned these in precious quarter-pint jars ( half the size of the normal half-pint jam jars).

Sexy Blackberry Jam:
Combine in a container and refrigerate overnight to macerate:
2 lbs blackberries (approx 6 C)
1/2 C sugar
1 TB lemon juice

The next day, prep a boiling water bath, get out 3 half pint (or 6 quarter pint) jars and lids. Sterilize the jars.

Pour the macerated blackberries into a pan and bring up to a boil.  Stir occasionally. Using a thermometer, check for the temp to hit 212 F.

Pack into sterilized jars leaving 1/2 inch headspace, wipe tops and apply lids. Carefully place into boiling water bath and process for 10 minutes.