01 -
Combine pureed watermelon, lemon juice, and sugar in a pot. Bring the mixture to a rolling boil, then reduce heat to simmer.
02 -
Immediately add the pectin and whisk it in with a handheld whisk or a fork to ensure it dissolves without clumping.
03 -
Bring the watermelon jam to a boil again, then reduce heat and let it simmer, stirring every minute, for 20 minutes.
04 -
Pour the watermelon jam into a mason jar. It will set completely once it cools.
05 -
This watermelon jam can be canned or stored in the refrigerator for up to 1 month.