During the first few months after surgery, you body is converting your fat into energy. As a result, the meals are the the primary drivers. Making sure you take the required Protein, Vitamins and fluids are the most important elements at this stage.
I found that home-made Soups and chili worked well for me. They went down easy and as I progressed to larger meal volumes, they were up-scalable. The liquid portion of the Soups can count for some of your required liquid requirements. My nutritionist recommend 3 meals per day plus Protein supplements (protein shakes). I am now 18 months post-op from RNY and consume a cup per meal. They provide me with most of my protein by giving me 65 grams per day.
I wrote a short article about my experience with WLS including recipes. It is available at http://www.breadandbutterscience.com/Surgery.pdf
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