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In a large cooking pot over high heat, bring enough water to a boil, add a pinch of salt in the pot first, then pass mung bean sprouts, green and red bell pepper through the boiling water for 10 seconds. (Don't keep the bean sprouts in boiling water for long, put them in cold water to cool down when removed from boiling water. Adding seasoning to cold ingredients, this is a cold salad dish. Don't stir fry.)