In two separate bowls combine 2 cups of water with the chia seeds and 1 cup of water with the flax seeds. Stir each then allow to sit and absorb water for 15 minutes.
Add the raisins to a food processor (or finely chop by hand) until finely chopped. Grate the apple and add it to the raisins.
Add the chia seeds, flax seeds, cinnamon and salt to the raisins and apples. Pulse until combined forming a gooey dough. A food processor is not necessary, simply combine in a bowl. To make Plain Chia and Flax Crisps combine just the soaked chia, flax and salt and decrease the time of dehydration.
Spread into an even layer on two sheets in a dehydrator (use either Teflon sheets or parchment paper) and dehydrate at about 105°F for 8 hours, carefully flip the trays over onto a cutting board and score the drier side of each sheet into 13 sections, then flip over back onto the Teflon sheet or parchment paper so the gooey side is up and continue to dehydrate for another 8 hours. Break the crackers apart at the score lines, remove the Teflon or parchment paper and continue to dry for another 4-6 hours until crisp. NOTE: These may also be dehydrated in an oven on the lowest setting – just be sure to watch the time and follow the same procedure for scoring them – or break them apart as evenly as possible. Makes 26 large crisps. If the apple, raisins and cinnamon are omitted the recipe will make 20 crackers.