Dundee got off to a perfect start scoring early doors thanks to a penalty after Garza was fouled in the box. Up stepped Simon Murray to score with ease senting the keeper the wrong way.
It settled the team and they played some neat football with only the finish was missing. Montrose had a few break aways but never troubled Dundee too much.
Dundee went on to take control of the game and ought to have added more goals. Luke Graham headed over at a corner and should perhaps have scored. A lovely pass inside the right back by Tony Yogane freed Imari Samuels, but his low cross was inches too far ahead of Simon Murray in front of goal. Emile Acquah managed to wriggle and bulldoze his way through a hesitant defence but Clark blocked the shot.
The last 20 minutes of the half Dundee lost their way and too many passes went astray and the half ended 1-0.
Dundee made two changes at half time. Ryan Astley and Paul Digby came on for Plamen Galabov and Callum Jones. The switch of Astley and Galabov made sense. The Bulgarian defender had been booked and there had been too much space between him on the right of central defence and Drey Wright at right wing back. That had opened the way for Montrose to exploit the space behind Wright and send crosses into the Dee penalty area. The change improved Dundee’s shape and tightened both the defence and midfield.
Dundee just like the first half scored early and put the game to bed. Yogane showed good close control and strength to get away from two Montrose players on the halfway line. He sent Acquah away to run on and shoot. Clark parried, but straight to Simon Murray , who was six yards out facing an open goal. 2-0.
Ash Hay came on for Emile Acquah on the hour mark. But Montrose still had a go and put in two dangerous crosses which went too close.
But Simon Murray went off soon after and was replaced by Ethan Ingram. Hopefully his injury is not too bad. Fin Robertson moved more forward.
But Dundee scored three times in the last 10 minutes, first Clark Robertson scored after Motrose failed to clear on 81mins. The next goal was a good header home by Ryan Astley after good play from Garza and Graham.
And the final goal was when another good ball in from Samuels was knocked into the net by Luke Graham to make the final score 5-0 Dundee.
They were much better second half and the league starts next Sunday when Hibernian visit Dens Park.
Dundee: Jon McCracken, Plamen Galabov (Ryan Astley at half time), Clark Robertson, Luke Graham,Drey Wright, Callum Jones (Paul Digby at half time), Cesar Garza, Imari Samuels, Tony Yogane (Finlay Robertson 71), Simon Murray (c) (Ethan Ingram 76), Emile Acquah (Ash Hay 60). Unused Subs: Harry Sharp (gk), Billy Koumetio, Aaron Donnelly, PVictor Lopez
Referee: Duncan Nicolson.
Att: 1,808.