1 can (5 ounces) sliced water chestnuts, rinsed and drained
1 red onion, sliced, separated into rings
1 bottle (8 ounces) Italian dressing
1 to 2 cups cherry tomatoes, halved
Combine broccoli florets, mushrooms, water chestnuts, onion and dressing in a large bowl. Cover; marinate several hours, stirring occasionally. Just before serving, add cherry tomatoes, stirring gently to combine.