RAW DSer!

Look into Quinoa.  It's a good protein source,  and get yourself some ground flaxseed too.

What about firm, lite tofu?  It contains 35g protein for every 210 calories.  Quinoa has 8g per 222 calories.

Vegan = vegetable based foods only.  As I said, vegetable protein is processed differently.

Ultimately, your health as a DSer will suffer, as everything you mentioned using is plant based. Even extra heavy supplementation will not take care of everything!

If that's your choice, it's your choice, but it's one reason our surgeon quizzes prospective DSer;s about what kind of eaters they are before they get the DS.  She doesn't just hand it out to everybody, and I'm grateful that I found such a conscientious surgeon!

Let us know how it all works out for you.