You know your body and what it can take. If you miss the mark it will let you know.
I love cereal so I broke my last 4 day fast with a cup of Special K and whole milk. When nothing happened I had a regular meal after that. Then again I never had problem digesting stuff.
I’m a big fan of chicken soup. I usually make a full soup with all the veggies as my fast is coming to an end(tortuous). I usually go through the broth right away, wait an hour or 2 and eat the veggies. Everyone hits differently. I have a friend who after a 5 day fast are a whole pizza on his own… let’s just say he annexed the bathroom.