INGREDIENTS
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3 medium beets, unpeeled but scrubbed
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1-by-3-inch piece fresh horseradish, peeled and roughly chopped, or more to taste (may substitute prepared horseradish to taste)
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2 tablespoons cider vinegar (or substitute balsamic vinegar)
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1 tablespoon olive oil
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1 1/2 to 2 teaspoons salt
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1 to 1 1/2 teaspoons granulated sugar
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1 garlic clove, peeled (optional)