Lemongrass can be intimidating if you've never used it before. It comes in stalks that are layered, similarly to leeks. In this recipe, I call for lemongrass powder, but you can also use 3 stalks of fresh instead. To prepare it, remove the reedy outer leaves until you reach the tender inner leaves. Then, chop just the white parts (the bottom third of the stalk). You can also often find lemongrass in a tube as a paste. If you use the paste, use 3 tablespoons.