Bring to boil zucchini and pineapple juice until zucchini becomes soft. (3-5 minutes)
Add Sure-Jell and bring to a boil.
Once the zucchini mixture has come to a boil add sugar and crushed pineapple. Bring to a boil again and boil for 5 minutes.
Remove from heat and add peach flavored jello. Stir for 1-2 minutes to allow jello to dissolve.
Pour into sterilized jars (I like to use half-pints = 1 cup each). Clean rim of jars. This step is very important (if anything is on the rim the jar may not seal properly). Add sealing lid and ring.
Process in using a water bath method for 20 minutes. Remove from water and let rest for 24 hours.
After 24 hours confirm each lid sealed by pressing the "button" in the center of each lid. If it clicks it did not seal. See notes if this happens.
Store in a cool dry place for up to 2 years. Refridgerate after opening.