The primary ingredient in traditional Mediterranean tzatziki sauce is yogurt, typically strained Greek yogurt for its creamy texture. This sauce is commonly made by mixing yogurt with grated cucumber, garlic, olive oil, lemon juice, and various herbs such as dill or mint, resulting in a refreshing and tangy flavor. Tzatziki is often served as a dip or a condiment alongside grilled meats, pita bread, and vegetables. It is a staple in Mediterranean cuisine, particularly in Greek dishes, and highlights the region's emphasis on fresh and healthy ingredients in their culinary traditions.