Powdered galangal is also available. The Thai garlic head is made up of smaller cloves than the Western varieties. It is used abundantly in Thai cuisine. The aromatic rhizome of the ginger plant is an important ingredient of Thai main dishes and desserts. It must be peeled before it can be chopped, grated or crushed.
Fresh ginger is preferable, but powdered ginger can be substituted if necessary.
This herb is close to being the 'signature' ingredient of Thai cookery. Lemongrass is available in fresh as well as dried form. Dried Lemongrass is used for herbal teas, and only the fresh for cooking. Most recipes use only the bottom few inches of the stem. Lemongrass pieces are removed after the dish is cooked.