First things first, the other players need to understand who is the chef, so let them know their place.

Understand that if they cook food at Crock Pots or eat raw food, they are insulting your superiority. If informing them of their position did not work, you need to get practical. (Next Section)

After giving multiple failed warnings, you can now start Hammering down any Crock Pots that don't belong to you.

Make sure to keep an eye on those who still cook raw food at campfires, and add them to your blacklist; Now they will never receive any meal from you.

Now that you are in charge of the kitchen and all other player's food, constantly ask them to give you any food they have, when they come close to you.

If they still didn't listen, you may start a vote-kick; Since every player's survival chances highly depend on you, they will have to vote yes.