Combine the oats and blueberries in a large mixing bowl, set aside.
Microwave the butter and honey for 10 seconds or until fully melted, whisk together.
Pour the butter mixture into the bowl with the oats and stir ingredients together using a spoon.
Spray a baking sheet with preferred cooking spray and evenly spread the oatmeal mixture onto the pan.
Refrigerate for 30 minutes or until ready to serve.