This sous vide octopus terrine with langoustine is an elegant and impressive dish that combines the delicate flavors of octopus and langoustine. The octopus and langoustine are cooked sous vide to ensure a tender and flavorful result. The terrine is then chilled and sliced, creating a beautiful presentation. Serve the octopus terrine with langoustine as an appetizer or as part of a seafood platter for a special occasion.