Preheat oven to 350 degrees. Spray a baking sheet with nonstick cooking spray.
Spread oats, oat flour, coconut, and nuts on the sheet. Bake in the oven for 8 minutes, until just becoming toasted.
Remove from the oven and immediately place in a large mixing bowl.
Add remaining ingredients to oatmeal mixture. Stir until well combined.
Set aside. Line a 9x12 glass baking dish with foil. Spray with nonstick cooking spray.
Press the granola mixture into the pan. Bake for 13-18 minutes at 350 degrees, cutting into bars halfway through.
For a softer granola bar, bake for 13-15 minutes. For a crunchier granola bar, bake 15-18 minutes.
Once bars are done baking, cut on the lines once more.
Allow to cool completely in the pan. Remove by lifting the foil. Break bars apart and store in an airtight container.