Galangal is prepared by peeling and slicing, grating, or pounding it. Its flavor is citrusy, earthy, and slightly peppery, unlike ginger's spicier and sweeter profile.
Preparing galangal involves a few simple steps. First, wash the rhizome thoroughly to remove any dirt. Next, peel the outer skin using a vegetable peeler or a paring knife. The skin can be quite tough, so be sure to remove it completely. Once peeled, you can slice, grate, or pound the galangal depending on your recipe's requirements. Slicing is suitable for soups and stews, grating works well in marinades and sauces, and pounding releases the most flavor for pastes and curries.
Galangal and ginger, while related, have distinct flavor profiles. Ginger is known for its spicy, warm, and slightly sweet taste. Galangal, on the other hand, offers a more complex flavor. It's citrusy, with notes of pine and earthiness, and a subtle peppery kick. Some describe it as having a slightly medicinal aroma. The difference in flavor makes them suitable for different dishes, although they can sometimes be used as substitutes with adjustments to the recipe.
When substituting galangal for ginger (or vice versa), start with a smaller amount than the recipe calls for and taste as you go. Galangal's stronger, more assertive flavor can easily overpower a dish if used excessively.