Cauliflower and Broccoli Salad

My Dad made this delicious salad recently and it is crisp, crunchy, and slightly sweet with lots of flavor. I always think of this type of salad for summer meals but, it was especially good during the last days of Winter. A promise of warm weather to come.

6 cups broccoli florets
6 cups cauliflowerets
3 medium red onions, halved and sliced
2 cups mayo
1 cup (8oz) sour cream
1/4 cup brown sugar
1/4 cup cider vinegar
1 tablespoon worchestershire
3 teaspoons dill weed
2 teaspoons salt
Dash hot sauce

In a large bowl, combine the broccoli, cauliflower and onions. In a small bowl, combine the remaining ingredients. Pour over vegetables and toss to coat. Cover and refrigerate for 4 hours before serving.