According to this method, the products are produced by continuously co-extruding a bead (B) coated with a starting base comprising hydrocolloids so as to form a skin by calcium gelation when the sausage passes into the elongated gelation bath (2), said bead then being shared out into portions (P) placed in trays (C)Many beads (B) are co-extruded by parallel co-extrusion heads, (1) transit into a common gelation bath (2), are brought side by side so as to then be placed into portions by given means (3) acting on all said beads (B) so as to form batches of identical products perfectly grouped and aligned so as to be loaded into their packaging tray (C).