Fresh lemongrass is available at most large supermarkets now; otherwise, try your local Asian market to get your hands on the herb. Dried lemongrass is common, although it isn't as flavorful. Lemongrass tea is also readily available.

When shopping for fresh lemongrass, look for stalks that are green, firm, and fragrant and with outer leaves that aren't too desiccated (indicating a longer time in storage).

Stir-fry onion and garlic in wok until tender; add pork, shrimp, lemongrass, and chilies, cooking 5 minutes further, or until pork is done. Add sugar, fish sauce, lime juice, ketchup, black pepper, eggs, noodles, bean sprouts and chives; cook, stirring well for 2-4 minutes, until egg is pretty much cooked and set.