I used the apples to
give better consistency to all but the blackberry puree though any
combinations can be tried. I made the apple puree first with 1200g roughly
chopped apples with 1 cup of water and juice of 2 lemons cooked in a pan gently
till soft and then pressed through a sieve with a wooden spoon (or back of a
ladle works well). Add sugar to taste a little sharp, for me this was about 150g.
I pureed the blackcurrants,
chokecherries and elderberries individually and mixed each of them with the same
quantity of the apple puree. For the blackberries, I made a puree without
adding apple as they were very ripe. Then I tested for taste and added sugar if
needed. I tried two different methods of drying: a Stockli dehydrator with 3 round
trays and temperature setting about 40-50°C, and the oven with 3 baking trays
at the lowest slow cook setting. For each leather I covered the tray with a
sheet of clingfilm, and then poured on a thin layer of mixed puree. The depth
of about 3 mm is supposed to be ideal but my layers varied quite a lot and I discovered
thin makes a crispy leather while thick makes a rubbery one.
The thinnest layers of
blackberry only puree needed over 16 hours in the dehydrator. The other thicker
leathers needed between 7 and 12 hours in the oven with frequent checking. Once
dry the leathers feel stiff and peel off the clingfilm readily - then they can
be rolled up and sliced - or keep some with the clingfilm. Half have gone in
the freezer, a quarter given away, the rest (pictured) will be eaten very soon!
Although they all look rather similar, each has a distinctive yummy taste!