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This blows my mind!: Microwave Minute Muffin. Mix 1/4 cup quick oats, 1 egg, handful blueberries, sprinkle of brown sugar, and 1 tbsp soy or almond milk in a mug, and microwave for 1 min (+30 sec if not firm).
Blueberry Pie Bars..uses fresh blueberries and uses one "mix" (homemade not cake mix) for crust and topping. One person added a bit of lemon zest to mix said it was great. No one has used frozen blueberries that made it but worth a try!