Just as WASPs, Irish-Catholics and Our Crowd Jews once made the ascent from immigrants to powerbrokers, it is now the Indian-American’s turn. Citigroup, PepsiCo and Mastercard are just a handful of the Fortune 500 companies led by a group known as the “Twice Blessed.” Yet little is known about how these Indian emigres (and children of emigres) rose through the ranks. Until now…