How about a nice chicken/veggie soup?

1 can (14 oz) chicken broth (low-sodium canned or make your own)
3/4-1 cup of veggies, cooked to soft - celery, green beans, cauliflower, zuchini (actually any legal veggie you like)
1/4 - 1/2 cup of shredded chicken/turkey

In small saucepan add all these together till just to boil. You can add some heavy cream to make "cream of chicken soup".

When I had a tummy virus and when I had dental surgery I ate this "concoction" - it was filling, totally legal and nothing feels like chicken soup