Tzatziki is a classic Greek condiment made of yogurt, grated cucumber, garlic, lemon or vinegar, and fresh herbs like dill or mint or thyme, and sometimes olive oil. While the recipe can vary from region to region in Greece, it is served with the mezes, or small plates appetizer portion of the meal, and can remain on the table as a condiment with roasted meats and vegetables.
Street foods like gyros or kabobs are always garnished with tzatziki.
Pretty good from the Wanderlust Kitchen