Do NOT try this recipe UNLESS you have a DEEP (heavy bottomed) pot! (Like 9 inches, at least.) It WILL boil over on you in a regular sized pot. :)
7 cups strained watermelon juice
6 1/2 cups of sugar
1/3 cup plus 1T lemon juice
2 boxes of (no sugar) Sure Jell (pink box)
Prepare jars and lids. (Makes approx. 6 pints.)
Pour watermelon and lemon juice into VERY deep stock pot.
In a bowl, whisk 1/2 cup sugar and both boxes of Sure Jell together.
Whisk the Sure Jell mixture into the juice.
Bring juice to a hard boil. (This will take between 5 and 10 minutes.)
Whisk in the remaining sugar and return to a hard boil that cannot be stirred down.
(This is why you MUST use a very deep pot.)
Boil for ONE minute.
Remove from heat and ladle into prepared jars.
Process in canner for 10 minutes.