A great salad dressing for any occasion.
1/4 cup white-wine vinegar
1 tablespoon Dijon mustard
1/4 teaspoon salt
1/2 teaspoon pepper
Pinch of sugar
3/4 cup extra-virgin olive oil
In a small bowl, whisk together vinegar, mustard, salt, pepper, and a pinch of sugar.
Slowly add oil, whisking until emulsified, or shake the ingredients in a jar, or whirl them in a blender.