Preheat oven to 375ºF. Line a sheet pan with foil.
In a large bowl, combine oil, honey, cinnamon, nutmeg, vanilla, and brown sugar and stir well.
Add oats to the honey mixture and stir until the oats are completely coated.
Spread evenly onto a baking sheet and bake for 7-12 minutes or until golden brown. Cool on a rack until completely cool and store in an airtight container.