The Ghana international midfielder replaced Kristoffer Olsson in the 75th minute and he did not take long to find the back of the net.
It was his first goal of the season in 12 appearances.
Anderlecht raced into a 2-0 lead by the 54th minute when Sergio Gómez converted a spot-kick before the half time whistle and an own goal from Lawrence Shankland.
Shankland redeemed himself by scoring to get his side back into the game two minutes later.
Ivorian Christian Kouamé restored Anderlecht's two-goal lead before Ashimeru found the back of the net to seal the big win. Read Full Story