My son had his out a few months ago... The advice given to us and what really worked well was keeping on top of pain with paracetamol/panadol or whatever is recommended by your surgeon. Even when you think they don't need it, keep up with the doses and it avoids them having the pain get right on top of them.
Go with soft foods and iceblocks... Remember they may feel like absolutely nothing to eat for a few days and that's fine as long as you can get fluids into them. My son had an iceblock at the hospital in recovery, then some ice cream.... Then some jelly.... Then a honey sandwich... Then a biscuit... Then another iceblock!!! Lol that was all before he left recovery and given to him by the staff! He was pretty good for a few days, just felt like soft things and small amounts (cold smoothies were great and plenty of iceblocks, lemonade and also homemade fruit ones) then it was about day 3 or 4, he had a really bad day before he started the up hill climb! I was really surprised how quickly he came right!
I was advised by my local health place to start him on this oral powder that makes up to a yummy juice called immunofactors (bioceuticals brand) after surgery. Supports the immune system and helps recovery etc (also used arnica dissolvable tabs) have found the powder to be great since when son has been unwell.
Build up the immune system a little before surgery too (just sneak some extra grated immunity strong foods into meals! Spinach, ginger, garlic, vit c rich stuff and any green veges etc!) I think that helped a bit too smile
All the best!!