Preheat oven to 300 °F. Line a large baking sheet with a silicone baking mat or parchment paper.
Mix together all of the dry ingredients in a large bowl. Add the maple syrup and oil and stir until evenly coated. Fold in the egg white.
Spread the mixture out evenly onto a prepared baking sheet (lined with parchment paper or a silicone mat) and bake for 45-60 minutes, until dry. Rotate the pan 180 degrees after 30 minutes.
Let cool completely on the pan and then break into chunks and store in an airtight container.
Video
Notes
LeftoversStore leftovers in an airtight container for up to 2 weeks or freeze for up to 3 months.