First - harvest your rhubarb, cut it and wash it.
If you're cutting your rhubarb late in the season, like me (I've actually cut it about 3 times) then you need to be sure you're not using the woody pieces - it if has holes, it's woody.
Measure out your rhubarb and put all ingredients in a pot.
Put on medium heat and bring to a boil. Stir and let boil for 30 minutes.
Then, after the 30 minutes, put in your Vitamix and puree.
Put in back on the stove in a clean pot for about 20 minutes on medium - until it's thicker.
Time to grab a jar! Jar up and eat. It'll keep for about 6 days.