You can also double this safely. You can use whatever flavor of Jello you want; I used 1 package of strawberry & 1 package of raspberry in my doubled recipe. I also used the food processor instead of mashing. Very easy to make!
This is my modification to Golden Coconut Rum Conserve (#35886). I used craisins to give it a little different flavor. [Addendum - I agree with the review below. I posted this BEFORE I had actually made it, when I was gathering recipes & ingredients. Since it SO good, I may try this again, adding some pectin. Other suggestions welcome!]