INGREDIENTS
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1 ounce dried shiitake mushrooms
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2 tablespoons cornstarch
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5 cups chicken broth
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4 tablespoons soy sauce
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1 teaspoon ground white pepper
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3/4 cup canned bamboo shoots, rinsed and drained and cut into matchsticks
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7 ounces soft tofu, cut into 1/2-inch cubes
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3 scallions, thinly sliced
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3 tablespoons white vinegar
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1 egg, lightly beaten