Blueberries
Why: This brain-booster is rich in disease-fighting antioxidants.
Puree it: Wash berries. If berries are underripe, steam three minutes. Drain and rinse under cold water. Puree for a smooth texture. Freeze in two-ounce portions for up to three months.
Mix it with: Peaches, bananas, pears, apples, mangoes
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