In small bowl, mix oil, syrup, brown sugar and vanilla.
Pour oil mixture into oat mixture and stir until well distributed.
On large rimmed cookie sheet, spread out mixture evenly.
Bake for 20 to 30 minutes, stirring every 8-10 minutes to ensure even browning.
Remove from oven and cool completely.
If you wish, add your favorite dried fruit and any other additional items (eg. puffed quinoa, coconut, bran buds, dried pineapple, dried cranberries, golden raisins, flaxseed, etc.)
Place in airtight container.
Store sealed in a cupboard for several weeks. For longer storage and maximum freshness, keep in freezer.
Video
Notes
To replace pie spice use your favorite combination of cinnamon, nutmeg, ginger, cloves and cardamom. Consider adding other seeds like ground flaxseeds, hemp hearts, chia seeds. Add dried fruits (cranberries, pineapple, raisins, apples) after roasting.