INGREDIENTS
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Pate Brisee (savory tart dough)
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250 g cake flour (about 2 cups)
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½ teaspoon salt
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125 g very cold unsalted butter, cubed (1 stick, ½ cup)
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65 milliliters (1/4 cup plus 1 teaspoon) very cold water
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Parchment paper and dried beans or pie weights will be needed
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Filling
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4 pieces of bacon, cut into strips
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4-5 mushrooms, quartered and sliced
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⅓ cup of grated Gruyere cheese
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¼ cup finely diced caramelized onions (optional)
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1 egg
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3 tablespoons milk
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3 tablespoons heavy cream
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¼ teaspoon salt
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pinch of nutmeg
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pinch of cayenne