Preheat oven to 300 °F. Line a large baking sheet with a silicone baking mat or parchment paper.
In a small bowl, whisk together the honey, applesauce and oil until smooth.
In a large bowl, mix together all the oats, pecans, flax, cinnamon, salt and apple chunks.
Add the applesauce mixture to the bowl with the oats and stir until evenly coated. Fold in the egg white.
Spread the mixture out evenly on a prepared baking sheet (lined with parchment paper or a silicone mat) and bake for 50-65 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.
Notes
LeftoversStore leftovers in an airtight container for up to 1 week or freeze for up to 3 months.