Our version of Broccoli Salad

1 pound broccoli florets chopped small (steam until al dente)
1/2 cup coarsely chopped walnuts (toasting is optional)
1/2 cup finely chopped yellow onion, sauteed
1/3 cup raisins/craisins

Dressing

1 cup mayonnaise
1 tablespoon vinegar
1/4 tsp sugar
1/2 tsp salt