"The secret to this super-flaky pastry is to grate frozen butter into the flour before incorporating it into the dough. Serve these hand pies warm, either as an appetizer or as dinner with a big green salad on the side...."
INGREDIENTS
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2 1/2 cups all-purpose flour, plus more for surface
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2 1/4 tsp. kosher salt, divided
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1 cup (2 sticks) frozen unsalted butter
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2 large eggs
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4 oz. feta
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6 oz. low-moisture shredded mozzarella
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3 Tbsp. coarsely chopped dill
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3/4 tsp. freshly ground black pepper