smoothing out any bumps carefully with your fingers and being careful not to push the stuffing out of the casing. Tie off the open end of the sausage tightly with a piece of string or make a knot in the casing itself. Repeat until all the stuffing is used up. To cook, slice the andouille 1 cm thick and grill in a hot skillet with no water for about dozen minutes on each side, until brown and crisp at the edges.