In a small bowl, whisk together vinegar, mustard, and sugar.
Season with salt and pepper and slowly add oil. Whisk or shake all ingredients in a jar.
Pour onto greens and serve.
Serves: 1 cup
Time: 30 minutesTime: 10 minsServes: 3-4Time: 1 hrServes: 6-8Time: 25 minutesServes: 4