In his six games since returning from injury, Stewart is averaging a solid 10.0 carries, 48.3 rushing yards, 0.3 touchdowns, and 10.4 fantasy points (in half-point-per-reception leagues).
During New Orleans' last four contests, the Saints have seen 27.8 carries for 149.8 yards and 1.3 touchdowns. Including receiving, that adds up to 30.5 fantasy points to running backs.
Double-digit touches against that defense should be enough to give you a fill-in play from Stewart.