1 lb. fresh broccoli, cut in small pieces
1 lb. fresh cauliflower, cut in small pieces
1 sm. onion, chopped
1/3 c. vinegar
1/3 c. sugar
2/3 c. low fat mayonnaise
1/4 tsp. salt

In large bowl, toss broccoli, cauliflower and onion together. In small bowl, beat the vinegar, sugar, mayonnaise and salt with a fork until well blended. Pour over vegetables. Refrigerate overnight.