carbs and sugar carbs and sugar carbs and sugar.
cut 'em and lose weight. we're flavor addicts in the western world, and we love in-your-face plates of flavor injected flavor. I'm a firm believer in making non-processed foods as large a part of ones diet as possible, even if said food has more fat in it then its processed brethren. The problem with de-fatted foods is they are pumped up with bullshit to take the fats place, bullshit that is always loaded with empty carbs which make us gain weight anyway.
Even sugar substitutes should be only an occasional treat. Splenda in unsweet tea is my personal favorite.
I lost 35 pounds this past year cutting carbs and sugar, zero exercise. I was pretty overweight though at 235, 5'11". Now I hover around 205, and while I occasionally enjoy an ice cream or white flour biscuit, for the most part my meals consist of lean meats and leafy green vegetables. It really took a mindset and lifestyle change for me.
I think your doctor's idea is a good one, but I would take out the fruit and go JUST veggies. Of course I'm just some guy on the internet though. Good luck!