INGREDIENTS
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3¼ cups chicken stock
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Leaves from a sprig of fresh thyme
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3 skinless, boneless chicken breast halves, about 1¼ pounds in total
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10 ounces pearl onions or shallots, peeled
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7 ounces button mushrooms, cleaned
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2 tablespoons butter
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1/3 cup all-purpose flour
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½ cup heavy cream
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1 pound, or 1 recipe, basic short pastry
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2 extra-large egg yolks, lightly beaten with 1 tablespoon water, for egg wash
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Coarse sea salt for sprinkling