You could do that, but I think it's probably easier to just do the cooking and give him other tasks that won't involve things burning down. Or the kitchen having to be redone because of smoke damage.

Oh, yeah. Since Jon's doing the cooking, Stephen has to do the dishes. He also has other household chores that he has to get done or else. They have a lot of rules like that which govern minor, everyday behavior, just to reinforce the dynamic.