According to the invention, in a method of preparing a sandwich by introducing a filling between two mutually facing portions of a piece of bread, the following operations are performed: placing a filling on a filling support dish; placing the dish with the filling on a tilting dish support fitted with a pusher or a handle; engaging the top and bottom portions of the piece of bread or dough product on either side of the pivot axis of the dish support; and actuating the pusher or the handle to cause the dish support to tilt together with the dish towards a space for filling as defined by said top and bottom portions of the piece of bread or dough product so as to obtain an angle of inclination for the dish that is suitable for causing the filling to slide off the dish into the space for filling, while retaining the dish on the dish support.