With the French side leading 1-0 thanks to Florian Thauvin's opener, N'jie doubled their advatage just three minutes after coming off the bench in the second half.
Dimitri Payet was played in down the left and he spotted the run of his Cameroonian team-mate.
Payet pulled the ball back, with N'Jie taking a touch to steady himself before slotting low past Alexander Walke to put the home side in the driving seat.
Check out the strike for yourself below:
April 26, 2018