INGREDIENTS
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2 sheets puff pastry (you can also use filo dough, click here for directions using filo)
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1 russet potato (9 oz) or 1 cup cold mashed potatoes
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1/4 cup crumbled feta cheese
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1/4 cup shredded kashkaval cheese (or substitute another 1/4 cup feta)
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1 egg
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Salt and pepper
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1 egg yolk
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1 tbsp sesame or poppy seeds for topping (optional)
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Nonstick cooking oil spray
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2 large baking sheets, rolling pin, mixing bowl