How do I make food not consumed upon being eaten?

There are two pretty simple ways to do it.

1. Create your item and add whatever food properties to it you want. Now on the food properties page set the item eating result to that same item (you'll have to finish the item and then re-enter it's editing menu to do that).

2. Create your item and add whatever food properties to it you want. Then create a new procedure. Place an if block that checks if the player is not in creative mode. Put the procedure block "Grow provided itemstack by 1" into it and save your procedure. Afterwards open your item's editor and select the procedure in "When player finishes using item".

The difference between the two is actually minuscule. If you use the first way you'll get a sound and a different animation sort of thing while with the second one you just finish eating the food as you normally would.

You're welcome! :>