Tzatziki (spelled many ways) has roots in the Mediterranean, from Greece through the Middle East, and then in the northern parts of Africa. Sometimes it's a dressing and sometimes a salad. I like to combine thinly sliced English cucumber, yogurt, a mere teaspoon of honey, salt and pepper. At the last minute, I add some chopped fresh mint. I serve it as a stand-alone salad, but I also use it on fish tacos.