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["Stir together chicken, cornstarch, and 1 teaspoon sesame oil in a small bowl.", "Stir together oyster sauce, soy sauce, sugar, and stock in another bowl until sugar is dissolved.", "Remove ridges from loofah with a vegetable peeler, then scrape skin lightly with a sharp small knife (a little green skin should remain).", "Cut loofah lengthwise into 2- by 1/2-inch sticks.", "Heat peanut oil in a wok over moderate heat until it registers 350F on thermometer, then cook chicken, stirring, just until no longer pink, about 11/2 minutes.", "Transfer to a bowl with a slotted spoon, then pour oil into a heatproof container and reserve.", "Heat wok over high heat until a bead of water dropped onto cooking surface evaporates immediately.", "Add 3 tablespoons reserved peanut oil, swirling wok to coat evenly, and heat until it just begins to smoke.", "Stir-fry mushrooms until lightly browned and tender, 1 to 2 minutes.", "Add beans, chiles, garlic, and ginger and stir-fry until fragrant, about 30 seconds.", "Add loofah and toss until well coated.", "Add stock mixture and bring to a boil.", "Add chicken and return sauce to a boil.", "Stir cornstarch mixture and add to sauce, then boil, stirring, until sauce thickens slightly and becomes translucent.", "Serve drizzled with remaining 1/4 teaspoon sesame oil.", "Also known as ""ridged gourd"" and ""Chinese okra.""
