Preheat oven to 300 degrees. Line a large baking sheet with parchment paper or a silicon baking mat.
Roughly blend the oats in a high speed blender or a food processor for about 10 seconds, just until it is roughly chopped, but not enough that it becomes flour.
In a large bowl, add all of the dry ingredients together and mix until thoroughly combined.
In a smaller bowl, add the remaining liquid ingredients and whisk until uniform. Pour the liquid mixture into the dry and stir until the dry ingredients are completely coated.
Using your hands, bread up the mixture a bit and crumble it onto onto the prepared baking sheet in a single layer. If needed, bake into 2 layers.
Bake for 30 minutes, stirring every 10 minutes. Remove from oven and allow it to cool completely.
Notes
Store in an airtight container for up to three weeks.
Recipe adapted from Worth Whisking.