Download Tzatziki Sauce By DelFrescoPure Pdf book free online – from Tzatziki Sauce By DelFrescoPure Pdf book; This is the cool and creamy sauce that is usually served as a condiment on Greek Gyro sandwiches. The recipe calls for the thicker Greek Yogurt, also called, “Greek Cheese”. If you can’t find this type of yogurt, you can use plain regular yogurt from the grocery store.