Is Anyone Interested In A Potato Salad Recipe?

Susan's little sister was over for a certain eleven year old's birthday party and had nice things to say about Susan's potato salad.
Susan doesn't like her potatoes cold and slathered in mayonnaise, but she likes this recipe because it uses sweet potatoes, garlic and balsamic vinegar. Susan's recipe allows for all sorts of substitutions but she will stick close to the original form.

1.5 pounds of small red potatoes (or any potatoes really), scrubbed & quartered
1.5 pounds of sweet potatoes, peeled and cut into chunks
1 tablespoon balsamic vinegar
1 tablespoon olive oil
1 garlic clove, minced (add more)
1/2 onion, finely chopped (use the whole thing)
1/4 cup chopped fresh cilantro, basil or oregano, whatever's handy
3 tablespoons mayonnaise
3 tablespoons plain yogurt (feel free to use fat free,
Susan does)
1/4 teaspoon salt
pepper

Susan has also been known to chop up a red and/or green pepper for a little crunch.

Simmer potatoes 15-20 minutes until tender. Drain & rinse under cold water.
Combine vinegar, oil and garlic in a LARGE bowl.
Add the onion and potatoes, toss to coat.
Combine the cilantro, basil or oregano with the mayonnaise, yogurt, salt & pepper.
Pour over the potatoes and toss to coat.
Refrigerate until cold.
Susan finds it tastes best the day she makes it.
Will anyone be put off to learn that it's a WW recipe?