At a friend’s house for dinner, I was wowed by the wine, the main dish, and a really nice/light possibly Italian salad dressing.  Here is my old friend Timmy’s recipe:

Ingredients

2 tbl plain yogurt – I use Greek style
1 tbl white wine vinegar or champagne vinegar
1 tbl lemon juice
2 tsp Dijon
1 clove garlic pressed
1/2 – 1 tsp salt to taste
3-4 grinds of black pepper
1/4 cup olive oil

Directions

Whisk first 7 ingredients together first, then add olive oil in a drizzle, while whisking, until incorporated.

I don't know which brand of Champagne vinegar Timmy used...I buy mine at the supermarket or Willaims Sonoma.