Use function command to get cheese or put a milk bucket in a furnace to get 16 cheese. Cheese gives the same amount of food points as a baked potato. Feel free to use this as a template to learn how to add your own stuff to Minecraft.

The recipe on the knowledge book for the furnace looks like the recipe for a bucket. This is because when you smelt a milk bucket it will give you a bucket and when you collect the bucket, out will pop 16 cheese and you will keep the bucket.

The links with download in the name are the zip files. To open the zip file to view the folders and files contained within on a apple computer, double click on the zip file in downloads saved to your apple computer. I am not sure how it works on other computers, but is should be similar.

*both zip file and uncompressed zip file (zip fie that has been opened and looks like folders) work in the data pack folder of your minecraft world.