Preheat the oven to 300 degrees Fahrenheit. Mix together all of the ingredients in a large bowl. Spread the mixture out on a baking sheet lined with parchment paper. Place the pan in the oven and bake for 20 minutes. Remove it from the oven, then stir the mixture every 5 minutes on the pan the first 20 minutes as it cools. Once cooled to room temperature, transfer to an air-tight container. Will keep for 1 month.