I was really sick and couldn't eat much of anything for 2 months and lived mostly on the chocolate Soylent. I had issues staying hydrated so I also drank a lot of Liquid IV (Pina colada and watermelon were my favorites).
As I started to tolerate more solid food I ate: canned soup purees like butternut squash/tomato bisque/pea soup, powdered soup mixes from Bob's Red Mill or Knorr, steel cut oatmeal with mushrooms and chicken broth cooked in a pressure cooker, rolled oatmeal with nuts and dried fruit, grits, plain rice crackers, nut thins, fage 5% yogurt, bananas plain or blended up with milk, applesauce, cottage cheese, carrots cooked to mush. Also ate a lot of sweet potatoes and russet potatoes, I cooked a bunch of them whole in the pressure cooker at once and then I'd eat them all week.
Some of my friends recommended Huel or Plenny shakes but I never got around to ordering any.
I'd also avoid anything with too much oil, fat, hot spices, or sugar which can irritate the stomach and limit cruciferous vegetables like broccoli, cauliflower, kale which can be hard to digest.
Hope you feel better soon.
Wow! What an interesting read about someone I've never heard of, but whose work has impacted daily life in so many ways. Its amazing how many systems rely on accurately telling time and the intricate solution that NTP is.