Preheat oven to 325 degrees F. Pour oats into a mixing bowl, set aside. In a microwave-safe mixing bowl , combine peanut butter, honey and brown sugar and heat mixture in microwave until runny and smooth, about 25 seconds. Pour mixture over oats in mixing bowl and toss mixture with a spatula until evenly coated. Spread mixture onto a Silpat or parchment paper-lined baking sheet into an even layer and bake in preheated oven until golden brown, about 18 - 20 minutes, stirring once halfway through baking. Allow to cool completely and store in an airtight container.
