Seems that one of the tricks parents use to get their children to consume healthy meals also helps adults. A recent study found that people who "ate an entrée made up of 25 percent puréed vegetables - think carrots and squash mixed into carrot bread, or squash and cauliflower blended into mac and cheese - cut a whopping 360 calories a day. That's because the added veggies made food less calorie-dense per serving."* In addition to helping to cut calories, this technique will also give you the additional benefit of the added vitamins, antioxidants, and other nutrients from the vegetables.
*Source: Health, June 2011.