Welcome to Healing Well! I'm glad that you found us, and have found the posts here informative.
I had the surgery 3 years ago, and in case you haven't come across my recovery journal, here's the link. https://www.healingwell.com/community/default.aspx?f=45&m=2183443
It might provide you with some of the information you're seeking. Also, in the Resources section you can find this link:
It provides some helpful information regarding eating.
Every surgeon seems to have their own eating protocol. Many require liquids and soft foods for an extended period of time. I assumed mine would be like that, so I gathered and created homemade chicken broth, squash, applesauce, etc., and bought Carnation Instant Breakfast.
As it turns out, I used very little of what I'd gathered, because my surgeon had a much more liberal eating protocol. I was on liquids my one day in the hospital, then came home on soft foods.
At Day 6 he turned me loose to use my own judgement and my chewing abilities to eat "whatever could be chewed to a liquid." In that way, my mouth became my blender/food processor. I ate small bites and chewed, chewed, chewed thoroughly until it was a smooth consistency of a full-liquid diet.
I found this very satisfying, as chewing real foods was more enjoyable to me than eating blended food. That said, had my surgeon given me a different protocol I would have followed that.
A couple things that you may or may not have gleaned here:
Your wrap will become increasingly more swollen during the first couple weeks or so. Expect your swallowing to get worse before it gets better.
Stay away from iced drinks after surgery, as they can cause esophageal spasms while you're healing. Room temp or warm beverages are better.
Be sure to ask your surgeon or PCP for anti-nausea drugs and always keep them handy (always after surgery--even post-healing) because while some of us can vomit after a Nissen, vomiting or retching can harm your wrap.
Get some liquid Tylenol to use once you're feeling better and don't need the narcotic meds any more. Those narcotic pain meds will probably be needed at night longer, but you won't need them as long during the day.
If you have other questions, ask away!