Overeating healthy food isn't really possible; one would be physically full (stomach distended, etc.) before overconsumption of calories. I speak of the "Eat to Live" diet, Dr. Joel Fuhrman.  He simply regurgitates the well known facts about food; avoid processed food, avoid animal products.  Focus on green vegetables and beans.  Greens and beans, and nuts to a certain degree.  All of these should be raw. One can stuff themselves full to the brim with Romaine Lettuce (Caesar salad).  The calories consumed would be less than that of one quarter of a Big Mac.