Lemongrass is widely used as an herb in Asian and Caribbean cooking. It has a citrus flavor and can be dried and powdered, or used fresh. For curries, cut the stalk into thin rounds before pounding in a stone mortar to reduce to paste. Crushing lemongrass releases the aromatic oils and flavors that make it so unique. Lemongrass is often used in fish, poultry and stir-fry recipes.