Jehan kept the position through an early safety car and then a subsequent Virtual Safety Car period before unleashing his pace.
A thrilling battle against F2 champion Mick Schumacher and Daniel Ticktum saw the 22-year-old Indian emerge on top in the support race of the season-ending Formula 1 Grand Prix.
Mallya was confident British KF3 karting champion Jehan Daruvala has the potential to be the next Formula One driver from the world's second most populous nation.