INGREDIENTS
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1 teaspoon butter
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2 cups thinly sliced leek (about 2 large)
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1 (10-ounce) package fresh spinach
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1/3 cup fat-free milk
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2 tablespoons finely chopped fresh basil
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1/2 teaspoon salt
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1/4 teaspoon black pepper
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4 large eggs
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4 large egg whites
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2 cups cooked, peeled red potato (about 3/4 pound)
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Cooking spray
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1 1/2 tablespoons dry breadcrumbs
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1/2 cup (2 ounces) shredded provolone cheese