A cool and refreshing yogurt dip or spread, tzatziki is usually made with thick, full-fat yogurt. Draining the nonfat yogurt for 2 hours gives it a rich taste.
Line colander with a double thickness of cheesecloth. Add yogurt, and drain for 2 hours in the refrigerator.
Remove yogurt from refrigerator, and combine with cucumber, garlic, and dill in small bowl. Stir in oil, vinegar, salt, and pepper. Refrigerate, covered with plastic, until thick and smooth, at least 1 hour and up to 2 days.
Make the olive-cured olive oil by placing half a cup (2 and a half ounces) Moroccan or Kalamata olives in one cup of extra-virgin olive oil. Let steep for at least one day, and use as olive oil in salads, marinades, etc.