US Patent 11253097 Food preparation

A food heating device includes a plurality of chambers capable of receiving respective food items. The device further includes a steam generator and a plurality of valves for controlling admittance of steam from said steam generator into said chambers. The device is arranged to operate in at least one mode in which during a first period a first one of said valves is open and at least one of said valves remains closed and wherein said steam generator is operated to produce steam for a time less than said first period.