"These Ham and Gruyère Mini Turnovers are party favorites. Best of all, you can make them ahead, freeze them, and bake them when you're ready...."
INGREDIENTS
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1 cup (3 ounces) grated Gruyère
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4 ounces cooked ham (cut into ¼-inch dice)
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3 tablespoons half-and-half
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1½ teaspoons dried sage
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Pinch freshly ground pepper
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Flour (for work surface)
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1 box (17¼ oz) frozen puff pastry (thawed)
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1 large egg (beaten)
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Whole-grain Dijon mustard (for serving)