"Pigs in blankets can be frozen until firm, then stored in freezer bags up to one month ahead...."
INGREDIENTS
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All-purpose flour, for surface
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2 sheets puff pastry (about 1 pound), preferably all-butter
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Honey Dijon mustard
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18 fully cooked sausages (each about 5 inches long), such as frankfurters, Andouille, or chicken sausages
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1 large egg, beaten
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Poppy seeds, for sprinkling (optional)
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Flaky sea salt, such as Maldon, for sprinkling (optional)
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Mustards, such as brown or whole-grain, for serving (optional)