I do believe you can get fat even if you eat only "real food", the trick is to eat in moderation. If you eat more calories than you use up you will gain weight. It really is that easy. You could loose weight eating pastries only, just as long as you don't eat too much. It wouldn't be healthy though...
It's really hard to eat too many calories if they come in the form of vegetables. Caloric density is important. So are additives like MSG that mess up your sense of satiation.
