Hi bigun
I had my sleeve on Tuesday and am managing puréed food well now. I was on fluids for a day then onto soup for a day, and now purée. I have to be on this for four weeks before the 'soft food stage'
Purée stage can be anything blitzed basically! But focus on protein first. For example I have been buying little ready meals such as cottage pie, fish fie etc and just putting them in the liquidiser with a slug of milk or gravy to loosen them a bit. Doesn't look great, but really tasty and they slip down easily. Much better than having soup day in day out!
Good luck with it.