INGREDIENTS
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1cupbuttermilk
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1/4cupolive oil
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46-inch pitas, torn (about 6 cups)
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3cupstrimmed and torn watercress
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6radishes, sliced (about 1 cup)
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1/2medium cucumber, chopped (about 1 cup)
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4ouncesFeta, crumbled (about 1 cup)
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2tablespoonsfresh lemon juice
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kosher salt and black pepper