Patent ID: 8071922

Claim:
A method of operating an oven that includes an oven chamber that comprises a plurality of walls, one of said walls being vertical and comprising a baffle plate, said method comprising: circulating heated air between a fan box and said oven chamber via said baffle plate; converting with a removable impingement plate at least a portion of said circulating air to (a) an impingement mode, where columns of impingement air flow substantially in a vertical direction within said oven chamber toward a food product when said removable impingement plate is disposed within said oven chamber, and (b) a convection mode when said removable impingement plate is removed from said oven chamber; providing microwave energy into said oven chamber via at least one wall of said plurality of walls of said oven chamber; and controlling said oven in at least one mode selected from the group consisting of: a microwave mode, said convection mode, said impingement mode, a combination microwave and impingement mode, and a combination microwave and convection mode.