I had yum woon sen (bean thread noodle salad) last night. So good. The noodles are made from mung bean usually. There is a korean style called japchae that is made from sweet potato I think.
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add in carrot, garlic, chili, green onion, shrimp or ground chicken, season with lime juice, fish or soy sauce. Add in peanuts (raw or plain) cilantro, mint, basil, etc.