Both of these Mediterranean sauces are made with ingredients like Greek yogurt and mint leaves, and you will often find them paired with similar recipes. However, this is where their similarities end.  Tzatziki is a fiercely fresh and flavorful sauce made with Greek yogurt, cucumber, fresh mint, vinegar, tons of garlic, and warming spices like cumin and cayenne pepper. Also called gyro sauce, this bright, tangy recipe is a mainstay in countless Mediterranean households.  Tahini yogurt sauce, on the other hand, is a simple combination of tahini, Greek yogurt, mint leaves, and lemon seasoned with simple salt and pepper. Also an everyday condiment, this sensational sauce makes the perfect dip, dressing, drizzle, or marinade.