This is a mod that gives you free food. The only requirement is that you have to install it. If you're thinking about it, you'll probably find its description a little more accurate than the one I wrote here, but I'm not sure how to explain it better, so just take a look at the screenshot and you'll understand it better.

So, it's a cheat. But it's not like other cheats, you don't need to do anything else than installing this mod. Once you do that, you can just sit back and enjoy the free food that your city is going to produce.