Sauté mushrooms, onion, carrot, and celery in butter over medium heat, about 10 minutes, stirring occasionally. Remove from heat; stir in salt and one tablespoon mustard. On lightly floured surface, roll each patty shell into 7-inch circle; spread each circle with mustard to within one inch of edge. Cover mustard with sliced roast beef, dividing evenly. Spoon vegetable mixture over beef; sprinkle with cheese. Brush edge of each pastry circle with egg wash mixture. Bring 2 sides of pastry up and over filling to form package. Press edges firmly to seal. Brush with egg wash; place on ungreased pan. Bake at 425° for 15 minutes.
Fun Fact: With no foothills to mar the view, the Teton Mountain Range is considered the most photogenic of America’s mountains. Rising 7,000-plus feet from the floor of Wyoming’s Jackson Hole Valley, the Tetons are the youngest mountains in the Rockies. The Teton Range has more than twelve peaks at elevations greater than 12,000 feet, with it’s highest peak, Grand Teton, reaching 13,770 feet.
This Roast Beef Pastries recipe is from the Best of the Best from the Plains Cookbook Cookbook. Download this Cookbook today.
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