Preheat oven to 350 degrees
Line a baking sheet with parchment paper
In a food processor, blend the walnuts and water until the mixture becomes a lump
Add the maple syrup and vanilla and blend until mixed.
Pulse in the flours and oats with as few rotations of the blade as possible
Add the cranberries, nuts, chips or raisins and blend a few more times
Remove the dough from the processor and form into a roughly 9x13" log.
Place on the lined pan and bake for 25 minutes. Set aside to cool. Decrease oven to 300 degrees
When cool enough to handle (5-8 minutes), use a serrated knife to slice into 1/2-inch slices.
Place the slices flat on the same lined baking pan. Bake for 10 minutes on each side until both sides are lightly browned.
Cool and serve when crisp.