Participants in this study who ate the Med way consumed about 200 calories more per day than the participants who ate a low-fat diet heavy on bread, potatoes, pasta, rice, fruits, vegetables and fish and light on baked goods, nuts, oils and red meat.

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In a study co-authored by Rolls and published in a 2011 issue of the American Journal of Clinical Nutrition, people who ate an entree made up of 25% pureed vegetables -- in this case, squash and cauliflower were blended into macaroni and cheese -- consumed 360 fewer calories per "volumize" the dish, tricking your brain into thinking you're eating more when in fact you're eating less.

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Immigrants, who ate it on their way to the United States, began making it with fresh meat when they reached this country.

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