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1
Pour the vegetable broth into a saucepan and bring to a boil over high heat.
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2
Measure the texturized vegetable protein and vegetable flakes into a large mixing bowl.
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3
Pour the boiling broth over the texturized vegetable protein and vegetable flakes; soak for 15 minutes.
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4
Meanwhile, melt the butter in a large skillet over medium-high heat, add the mushrooms and onions; cook and stir until soft, about 10 minutes.
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5
Stir the texturized vegetable protein and vegetable flake mixture in with the mushroom and onions.
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6
Pour the beer into the skillet with the vegetable mixture; remove from heat and cool.
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7
Preheat oven to 450 degrees F (230 degrees C).
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8
Whisk the egg and milk together in a small bowl.
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9
Line a deep dish pie plate with one round of the prepared pastry.
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10
Pour the vegetable mixture into the pastry shell.
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11
Prepare the top pastry by cutting a 2 to 3-inch hole in the center of the round using a knife or a decorative cookie cutter.
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12
Moisten the edges of the bottom round with water.
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13
Place the top round of prepared pastry on top of the meat filling, pressing around the edges and crimping to seal.
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14
Brush the top of the pastry with the egg and milk mixture.
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15
Bake in the preheated 450 degree F (230 degrees C) oven for 15 minutes.
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16
Lower the oven temperature to 375 degrees F (190 degrees C) and continue baking until the crust is golden brown, 30 to 40 minutes.