- 1/2 cup fat free sour cream
- 2 tablespoons red wine vinegar
- 1 teaspoon Dijon mustard
- 1/4 cup crumbled blue cheese
- 2 tablespoons minced red or green onion
- Salt and freshly ground pepper to taste
- In a small bowl whisk together sour cream, vinegar and mustard; stir in cheese and onion. Season with salt and pepper. Dressing can be covered and refrigerated for up to one week. Serve on sliced tomatoes or crisp torn greens.