Tzatziki sauce is easy! All you need is greek yogurt, cucumber, garlic, lemon juice, olive oil, salt, dill, and just over 15 quick minutes to make this irresistible Greek recipe.Serve it as a topping, dip, starter, or side dish with grilled vegetables, salads, pita bread, fritters, and falafel. And you can substitute Greek yogurt with dairy-free yogurt to make a delicious non-dairy tzatziki recipe.