INGREDIENTS
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1/2 cup buttermilk
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1/4 cup mayonnaise
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1 tablespoon fresh lime juice
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1 1/2 teaspoons ground cumin
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1/4 teaspoon cayenne pepper
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2 pounds small white-skinned potatoes (such as White Rose)
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1 cup cooked corn kernels (from 1 medium ear)
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1/2 cup chopped sweet onion (such as Vidalia or Maui)
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1 14-ounce can hearts of palm, drained, each cut crosswise into 1/3-inch-thick rounds
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2 plum tomatoes, seeded, diced (about 1 1/4 cups)
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1/2 cup chopped fresh cilantro
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1 avocado, pitted, peeled, chopped