Preheat your oven to 350 degrees.
Toss the oats, grains, nuts and seeds together in a large bowl.
Gently heat the oil, honey and cinnamon together in a small saucepan, whisking well. Pour the hot mixture over the oat mixture. Stir well to coat and then pour onto a baking sheet or two forming a thin even layer.
Bake for 10 minutes or so. Stir well and continue to bake, checking every few minutes and stirring until the granola is golden and crispy. Let cool and then stir in raisins.