In large saucepan, cook and drain tortellini as directed on package, adding cauliflower and broccoli during last minute of cooking time. Rinse with cold water to cool; drain well.
Meanwhile, in large bowl, mix tomatoes, onion, parsley, bell pepper and artichokes.
Add tortellini, cauliflower and broccoli to salad; stir gently. Add dressing and reserved 1/4 cup artichoke liquid; toss to mix. Serve immediately, or cover and refrigerate until serving time.