Two of the very best things to eat when your stomach is upset or in your case recovering, are mac-and-cheese, and cherry Jello. They even go good together. When my stomach is upset I put some mac-and-cheese in one side of a bowl, and some cherry Jello in the other side of the bowl. I sit in a comfortable chair and take my time eating some of one, and then some of the other. Before I even finish it all my stomach feels better.
To make cherry Jello: Read the instructions on the box to see how much water to use for the size of the box you have. Measure out a little less water into a bowl than the box calls for and use that as the total amount of water you will be using to make the Jello. Jello sets up much better if you use a little less water than the package calls for. Put about half the water in a pot and bring it to a boil, or into a large Pyrex measuring cup and microwave it until it is very hot, like boiling or just below boiling.
Carefully take the hot water off the stove, or the hot water out of the microwave using thick insulated kitchen gloves made to protect you from getting burnt.
Pour the envelope of Jello into the hot water and stir the mix with a large spoon for several minutes until the powder Jello is completely dissolved. After it looks completely dissolved stir it some more like another minute because it can look dissolved when it is not. Put the hot Jello in a large bowl and add the remainder of the water you previously measured. Stir for several minutes, and then refrigerate for a couple of hours before serving.
Mac-and-cheese and cherry Jello settles an upset stomach very well.