Prep Time: 10
Cook Time: None
Serves: Serves: 4
Combine corn, cheese, celery, tomatoes and green onions in medium bowl; set aside.
Combine vinegar, sugar, mustard and salt in small bowl. Gradually add oil, whisking until smooth and thickened. Stir in celery seeds, if desired.
Pour dressing over salad; toss gently to coat. Cover and chill several hours or overnight before serving.