I would install an US 240V@20A receptacle and replace the plug on the kettle.
You can also wire a duplex 120V with the two phases (you might find this in some kitchens, and in my workshop). Then you can make a dangerous extension cord adapter combining the split phase 120V into one 240V female plug.
You can also wire a duplex 120V with the two phases (you might find this in some kitchens, and in my workshop). Then you can make a dangerous extension cord adapter combining the split phase 120V into one 240V female plug.