I was burning my trash as well as boiling water when I saw the option to cook a baked potato. The only potato around was the burnt rotten one. So burning rotten potatos make them able to become fresh hot baked potatos again.
There was also a debug error that showed up saying that I did not have the required materials to craft it
The potato you were trying to cook burnt up while you were cooking it and it magic’d up a new, fresh one.
Step 1. Plant rotten potato
Step 2. Wait 12 to 20 weeks
Step 3. Dig up potatoes
Step 4. Cook potatoes
Step 5. Enjoy your fresh baked potato! So quick and easy!