I'm on my pre-op diet too; I've lost about 9 pounds in the last 7 days. I have a Slim Fast for breakfast, a nice big GREEN ONLY salad for lunch, a Slim Fast around 3 and then dinner of around 300 cals for dinner. I do get very hungry at night, so I've been going to bed EARLY . I do eat as much GREEN salad as I want, I don't like the calorie free dressings so I've found that I like to mix lemon and vinegar!! I also eat sugar free jello (I made some orange jello with a can of mandarin oranges and instead of cold water mixed it with diet Sierra Mist - WONDERFUL!!).
I watched one of the surgeries on UTube and the reason the doctor wants us to lose 5% of our weight before surgery is because he has to go around the liver and there is LOTS of fat (and it looks like chicken fat!!) around the liver. If we lose the weight before the surgery that reduces the amount of fat around the liver and makes for an easier surgery.
Hang in there - we are all in this together!! One week from today I'll be banded!!