A vegetable peeler can mimic zesting results by creating wider strips of citrus peel, which can then be finely chopped to achieve a similar effect to zest.
When you don't have a zester, a vegetable peeler becomes your next best friend. The key is to use it carefully to remove only the colored part of the citrus peel (the zest), avoiding the white pith underneath. The pith is bitter and will negatively impact the flavor of your dish. Once you've peeled off strips of zest with the vegetable peeler, lay them flat on a cutting board. Then, using a sharp knife, carefully mince the strips into very small pieces, mimicking the fine texture of zest. This method allows you to extract the essential oils and citrus flavor needed for your recipe, even without a dedicated zester. Remember to peel away from yourself for safety.
To make mincing the peel easier, stack a few strips of the peeled zest on top of each other before chopping. This will allow you to create a finer zest more quickly and efficiently. Be sure to keep your fingers clear of the blade!