Preheat oven to 400°F (200°C). Place pastry on lightly floured work surface. Roll each into a 12” x 10” rectangle. Cut into 24 equally sized pieces. Fit each piece into cup of a greased mini-muffin tin. Prick bottom of each pastry shell and chill 10 minutes in freezer.
Meanwhile, whisk together eggs, cream, chives, mustard, salt, pepper and cayenne pepper. Divide cheese and sausage among pastry cups and pour egg mixture over top. Bake for 18 to 20 minutes or until eggs are set and pastry is golden brown. Cool for 5 minutes before serving. Serve warm or room temperature.
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