Mix all ingredients except for oil and maple syrup in a bowl. In another small bowl mix oil and maple, then drizzle evenly on top of the oat mixture. Toss until evenly coated. Place on the baking sheet in one layer. Bake for 25-30 minutes, stirring the mixture every 10 minutes to prevent burning. Allow to cool to room temperature. Store at room temperature or in the fridge in an airtight container for up to a month.