If time allows defrost up to 2 hours in refrigerator.
Place foil on baking sheet and grease with butter or olive oil and then place beef on sheet.
Mix a whole egg with water and brush beef.
Preheat oven to 425 degrees and cook for 10-15 minutes.
Reduce temperature to 375 and cook about 10-15 minutes until internal temperature is 160 degrees. Insert a stick thermometer into the thickest part of the product, using the hole in the center of the pastry flower for access to avoid marring the pastry.