I just use some low-fat sour cream; grate some cucumber or cut up finely; add some dill weed; stir in some lemon juice; add a pinch of bulk Splenda (it just adds something); sometimes I add a little finely chopped onion. I also have a Dill Blend spice that I sometimes stir in.
But Kalyn's Kitchen
is a wonderful site with lots of South Beach recipes. You really need to check out many of her recipes. Here is a Tzaziki sauce that she posted. I have also included the link to her site for the recipe with more information about the recipe:
Her website with this recipe: Kalyn's Kitchen recipeTzatziki (Greek Yogurt and Cucumber Sauce)
(Makes about 3 1/2 cups. You can cut the recipe in half, but it's so good, you really shouldn't. Recipe courtesy of Georgette.)
3 cups Greek Yogurt (or regular plain yogurt, strained as described above)
juice of one lemon (about 3 T)
1 garlic clove, chopped
2 medium cucumbers, seeded and diced
about 1 T kosher salt for salting cucumbers
1 T finely chopped fresh dill (can substitute mint leaves for a slightly different version)
Kosher salt and fresh ground black pepper to taste
If you don't have Greek yogurt, strain plain yogurt as described above. Peel cucumbers, then cut in half lengthwise and take a small spoon and scrape out seeds. Discard seeds. (If you use the small seedless or European cucumbers with few seeds, you can skip this step.) Slice cucumbers, then put in a colander, sprinkle on 1 T salt, and let stand for 30 minutes to draw out water. Drain well and wipe dry with paper towel.
In food processor with steel blade, add cucumbers, garlic, lemon juice, dill, and a few grinds of black pepper. Process until well blended, then stir this mixture into the yogurt. Taste before adding any extra salt, then salt if needed. Place in refrigerator for at least two hours before serving so flavors can blend. (This resting time is very important.)
This will keep for a few days or more in the refrigerator, but you will need to drain off any water and stir each time you use it.