The Alpine Academy racer lost the lead to Nikita Bedrin (Jenzer) off the line, but made it back into the lead by lap eight before cruising to victory.
Bedrin, who started second after a previous series best start of 14th, snatched the lead at Turn 1, but lost out when Mini deployed DRS.
He held second before a final lap shootout with championship leader Gabriel Bortoleto saw the Trident driver snatch the runner-up spot at the penultimate corner.
As Bedrin took the lead at the start, Mini settled into second while Christian Mansell, who took his maiden podium at Silverstone last weekend, ran third for Campos.
Bortoleto made it past Mansell for third on lap five with the help of DRS into Turn 1, with Prema’s Paul Aron repeating the move the following lap but running wide and allowing Mansell to hold fourth.
Mini clinched the lead on lap eight with the help of DRS, but Bedrin at this stage looked safe in second with a six-second gap between the leading pair and Bortoleto in third.
Sunday polesitter Zak O’Sullivan (Prema) made contact with ART driver Nikola Tsolov on lap 12, damaging his front wing in an incident which will be investigated after the race.
The safety car was then deployed after Sebastian Montoya (Hitech) came to a stop on track at Turn 13. He'd earlier made contact with VAR driver Tommy Smith, while Roberto Faria spun his PHM-run car. Rodin Carlin driver Ido Cohen was forced to retire with damage, and Hugh Barter (Campos) was also caught up in the tangle.
Source: Autosport