They gave me cream of wheat in the hosp after my surgery. I was told that was part of the liquid stage. Also cream soups as long as they're strained so that you're not getting the chunks of chicken or mushrooms or whatever.
I also made very runny mashed potatoes one night, with Skim milk to add some protein. Thinking about making that again with chicken broth added in.
At this point, yeah, I'm ready to lick a steak!!
Good luck!