White rice with cooked ground beef. Drain the fat off the beef - only to make the meal milder and easier to digest, not because fat is bad. Salt is okay.
We used to tell pet owners to feed this to their pets when they had stomach upsets, but it's kind of my go-to thing if I've eaten something that doesn't agree with me.
Plain white rice or plain cooked potatoes are also bland enough to almost always stay down.
I hope you feel better.