Sour yogurt toppings

Illustration: Lisa Greene

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At first glance, the tart flavors found in citrus fruits and other acidic foods may not seem like a natural fit for yogurt. Yet the zest from a lemon, or a few shavings of bitter dark chocolate, add an unexpected kick.

Blueberry + lemon zest + chia seeds

Lime zest + kiwifruit

Dark chocolate + raspberries

Cantaloupe + nutmeg