2 tablespoons balsamic vinegar, traditional or white balsamic
2 tablespoons sugar
1 pound fresh broccoli, sliced into small 1/2" florets, about 4 cups worth
2 cups red or green grapes, halved
1/3 cup finely diced red onion
1/2 cup chopped pecans
Stir together the mayonnaise, vinegar, and sugar in a large mixing bowl. Add the broccoli, grapes, and onions. Stir well to coat with the dressing. Stir in the pecans, reserving a few for sprinkling on top. Chill in the refrigerator until ready to serve. Stir again just before serving.