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1
Preheat oven to 375 degrees F (190 degrees C).
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2
Separate crescent roll dough into 16 triangles.
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3
Place 8 dough triangles onto a large baking pan, arranging them in a circle with the wide ends together in the center. Pinch the corners of the wide ends together to join the circle.
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4
Place a new dough triangle down next to an existing one with the pointed end towards the center. Pinch the two triangles together to make a rectangular-shaped petal. Repeat with remaining 7 triangles to make 8 rectangular dough petals in a circle.
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5
Mix mayonnaise, Dijon mustard, and black pepper together in a bowl.
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6
Lightly toss together cooked turkey, celery, parsley, cranberries, and Swiss cheese in a separate bowl. Stir the mayonnaise mixture into the turkey mixture until well combined.
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7
Scoop up about 1/2 cup of turkey mixture and place at the bottom of a dough rectangle towards the center.
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8
Fold the dough rectangle over the filling from the top towards the center, and pinch the top end down to enclose the filling in a ring-shaped piece of dough. Repeat with remaining filling.
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9
Brush the wreath with beaten egg.
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10
Bake in the preheated oven until the filling is hot and the crescent roll dough is golden brown, 25 to 30 minutes.
