Head to Grand Prix, choose Renault (the yellow car) and either driver.
Select France (Le Castellet) as your track.
In the race settings, you can change a few to make things easier/quicker:
> Weather: Clear
> Race Length: 3 Laps
> Rules and Flags: Off
> AI Difficulty: 0 (Very Easy)
Complete the race and if you finish in the Top 10, this will unlock.