Experiment - nothing can go wrong! For fruit rollups, if you do have a 'failure', cut leather into small pieces, cover with boiling water, leave for 30 minutes & make into sugarless chutney, jam or sauce!
Puree too thin? To fix this prolem, simply combine the mixture with other thicker purees.
Puree too thick? To make your puree thinner, simply add fruit juice or water to it, or combine with thinner purees.
Is your rollup brittle around the edges & still sticky in the middle? In this case, the puree hasn't been spread evenly across the tray.
Looking for a delicious treat for your children? Use your rollups that are not so sticky & cut them into shapes by tracing around biscuit cutters with a sharp-pointed knife. Kids will love them!