Ousmane Dembele has never been a deadly finisher and was guilty of missing a couple of big chances in the first half.
Bradley Barcola scored twice while Marco Asensio, Achraf Hakimi, Warren Zaire-Emery and Lee Kang-in were also on target.
PSG are now 13 points clear at the top of the table, a gap that second-placed Brest can trim to 10 points by beating Metz on Sunday.
Kylian Mbappe was rested for PSG's Ligue 1 win over Lille at the weekend to make sure he was fully fit for Wednesday's clash against La Real at the Parc des Princes.
Real Madrid were made to wait, but eventually conjured a stylish 2-0 victory at Cadiz on Saturday in La Liga, ahead of their Champions League trip to face Chelsea
Real Madrid's hopes of retaining the La Liga title were dented Sunday as the champions lost 1-0 at Real Mallorca, to remain five points behind leaders Barcelona.
Marco Asensio opened the scoring for Real Madrid as they went on to beat Valencia 2-0 in La Liga.
European champions Real Madrid made light work of Celtic with a 5-1 win to progress to the Champions League last 16 as Group F winners on Wednesday
Karim Benzema celebrated his Ballon d'Or win this week with a goal in Real Madrid's comfortable 3-0 win over Elche on Wednesday night, in which they also had three strikes disallowed for offside
UEFA Champions League: Fede Valverde and Marco Asensio netted in Real Madrid's 2-0 win over RB Leipzig at home.