INGREDIENTS
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1 sheet frozen puff pastry
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1 pound leeks
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2 tablespoons extra-virgin olive oil
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1 cup half-and-half
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3 eggs
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1 teaspoon freshly grated lemon zest
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1 teaspoon kosher salt
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freshly ground black pepper
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2 teaspoons ouzo (optional)
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2-1/2 ounces feta cheese, cut into 4 (approx 1/2-inch) slices