The Nigerian global, who was a major doubt for the Gunners clash, finished off a backheeled assist from Alexis Sanchez in the 56th minute after Nacho Monreal had shot Arsenal into the lead in the 16th minute.
The Gunners manager Arsene Wenger, who joined Arsenal back in 1996, marked the 21st anniversary of his arrival at the club with the victory.
"I'll be looking forward after the worldwide break - having hopefully made the next stage of World Cup qualification with Australia - to come back to Everton at home for hopefully another special day that we can turn into three points for us". The summer proved our worst fears right, though, and the start of the season gave us all that awful sense of deja vu, but perhaps the pessimism was a bit presumptious because things have improved.
"In the end for us it was a very testing win".
"After Liverpool we talked because we can't play as we did".
After a poor start to the season, Arsene Wenger's men have managed to transform their fortunes with six wins from their past seven outings in all competitions.
Arsenal owner Stan Kroenke, however, has been rock-solid in his support of the veteran French boss.
35 - Since 2016-17, Alexis Sanchez has been involved in 35 PL goals (24 goals 11 assists), more than double any other Arsenal player. Key.
A minor injury had kept Iwobi out of Arsenal's 2-0 win over West Brom on Monday night and he wasn't available for the Gunners' 4-2 away win at Bate Borisov in the Europa League.
Since then, the Gunners have won three and held champions Chelsea, one of their London rivals, to a goalless draw.
"We play like this it makes sense that we play like this usually we score in situations like this". It's very hard to be very expansive here, particularly when you are a team like we are that's just been promoted.
Chris Hughton's side lie 14th after seven games.
"I can't accuse the lads of not giving everything".
"It was always going to be hard here playing against an Arsenal side at home, your levels of concentration have got to be for 90 minutes".