punmama - I KNOW what you are talking about!
The best way to go to "real" food without weight gain and still maintain a loss is to tally up your calories, fat, protein, and carbs that your day consists of on WS. Then, add foods in with WS but not to exceed that of the the plan.
For example, I know that two grilled chicken tenders (roughly 3 ounces) and 1 cup of veggies is roughly equal to that of a WS shake.
Or, a McDonald's Egg White Delight without Canadian Bacon is equal to a WS Spicy Mac and Cheese.
Or, a one egg plus one egg white omelet with 1 ounce and 1 cup of veggies of cheese is equal to a snack bar.
It takes time to figure it out. Many days, I don't eat WS and just calorie count. and then, I have days I only eat WS. I change it up depending on how lazy I am and how much in the mood I am for the stuff.
It is doable. Promise, promise