The invention relates to a kit for the preparation of a foodstuff by cooking within a microwave oven and/or a gas or electric convection oven, in particular of ventilated type. The kit comprises a plastic container that can be baked in a microwave oven and/or gas or electric convection oven, in particular of ventilated type, a removable plastic lid that allows said plastic container to be opened and closed, a first sealed sterilized bag containing a dry product, that may be particularly farinaceous, and a second sealed sterilized bag containing a sauce. The sauce contains a condiment part and a humid part, in addition to the humidity of said condiment part. The ratio between the condiment part and the humid part of the sauce ranges from 10% by weight to 60% by weight regarding the condiment part and from 40% by weight to 90% by weight regarding the humid part. Further, the invention relates to processes for preparing a foodstuff contained in the kit, and processes for using the kit.
