A method is provided to present a cost- and environmentally-efficient method of pasteurizing and vacuum packing food, comprising the steps of providing a tray (1) with a first separating barrier (11) which divides the tray (1) into a first compartment (4) and a second compartment (5). Both the first compartment (4) and the second compartment (5) each have a flexible bottom, e.g. a first flexible bottom (6) and a second flexible bottom (7). The barrier (11) is formed such that it has a first channel (12) which connects the first compartment (4), which has a valve (16), with the second compartment (5). The contents inside each compartment is pasteurized and cooled, whereby a vacuum is created in the package (15) in such a manner that the flexible bottoms (6, 7) are caused to be concave relative the first compartment (4) and the second compartment (5) respectively. The result is a more hygienic and easier to prepare ready-to-eat meal with several compartments for different servings, having only one valve. Moreover, a package (15) is provided to be used in the implementation of said method.L'invention concerne un procédé rentable et respectueux de l'environnement pour pasteuriser et conditionner sous vide des aliments, ledit procédé comprenant les étapes consistant à utiliser un plateau (1) comportant un premier élément de séparation (11) qui divise le plateau (1) en un premier compartiment (4) et un second compartiment (5). Le premier compartiment (4) et le second compartiment (5) comportent tous deux un fond souple, par exemple un premier fond souple (6) et un second fond souple (7). L'élément de séparation (11) est formé de telle sorte qu'il comporte un premier conduit (12) qui relie le premier compartiment (4), qui comporte une valve (16), au second compartiment (5). Le contenu se trouvant à l'intérieur de chaque compartiment est pasteurisé et refroidi, puis un vide est créé dans l'emballage (15) de façon à ce que les fonds souples (6, 7) soient amenés à adopter une
