Preheat oven to 350 degrees. Prepare an 8x8 baking pan by spraying it with vegetable oil and lining with parchment paper, so that the ends hang off the sides. Set aside.
Evenly spread the oatmeal and chopped walnuts on a baking sheet and bake for 10 minutes until lightly toasted. Transfer the oatmeal to a large bowl. Add the wheat germ, flax and chia seeds, apple and raisins to the oatmeal mixture and toss to combine. Set aside.
Reduce the oven to 300 degrees.
In a small saucepan combine the almond butter, honey, brown sugar, maple syrup, canola oil and apple pie spice. Heat to boiling and cook, stirring for about 1 minute until everything is combined. Remove from heat and stir in the vanilla.
Pour the almond butter mixture into the oatmeal mixture and work with a rubber spatula until thoroughly combined. Transfer the granola to the baking pan and use your fingers to press the mixture firmly and evenly into the pan. Bake for 25-30 minutes. Allow granola to cool for an hour before breaking into pieces. Store at room temperature in an airtight container.