A vessel for cooking food, comprising: - a metal body comprising in its turn a bottom wall and at least one side wall, wherein said side wall extends from said bottom wall to define an inner compartment of the cooking vessel in which the food is arranged for being cooked; - at least one handle, constrained to a portion of the metal body by means of a metal fixing element; - at least one metal flame guard ring having a substantially annular shape, arranged around an end of the handle located at said metal fixing element, said metal flame guard ring being placed in contact with a portion of the metal body so as to allow thermal conduction between said metal body and said metal flame guard ring; and - at least one thermal signalling device comprising at least one bimetal sheet, wherein the bimetal sheet is placed at least partially in contact with one or more components (22; 24; 28) of the cooking vessel which have thermal conductivity properties, wherein the thermal signalling device is arranged to signal the achievement of a preset heating value of the cooking vessel with a progressive mechanical movement of said bimetal sheet related to the heating of the cooking vessel, and wherein the metal flame guard ring is provided with one or more through holes, slots or windows, the cooking vessel being characterized in that said bimetal sheet consists of a first strip of a first metal material and a second strip of a second metal material welded together, said first metal material and said second metal material having different coefficients of thermal expansion, and in that said bimetal sheet is shaped and dimensioned in such a way that at least one indicating portion (34, 38) of said bimetal sheet is at least partially visible through said through holes, slots or windows at a specific temperature value. - a metal body comprising in its turn a bottom wall and at least one side wall, wherein said side wall extends from said bottom wall to define an inner compartment of the cooking vessel in which the food is arranged for being cooked; - at least one handle, constrained to a portion of the metal body by means of a metal fixing element; - at least one metal flame guard ring having a substantially annular shape, arranged around an end of the handle located at said metal fixing element, said metal flame guard ring being placed in contact with a portion of the metal body so as to allow thermal conduction between said metal body and said metal flame guard ring; and - at least one thermal signalling device comprising at least one bimetal sheet, wherein the bimetal sheet is placed at least partially in contact with one or more components (22; 24; 28) of the cooking vessel which have thermal conductivity properties, wherein the thermal signalling device is arranged to signal the achievement of a preset heating value of the cooking vessel with a progressive mechanical movement of said bimetal sheet related to the heating of the cooking vessel, and wherein the metal flame guard ring is provided with one or more through holes, slots or windows, the cooking vessel being characterized in that said bimetal sheet consists of a first strip of a first metal material and a second strip of a second metal material welded together, said first metal material and said second metal material having different coefficients of thermal expansion, and in that said bimetal sheet is shaped and dimensioned in such a way that at least one indicating portion (34, 38) of said bimetal sheet is at least partially visible through said through holes, slots or windows at a specific temperature value.