Jamie Oliver's Grilled Fillet Steak and the Creamiest White Beans and Leeks

The original:
http://www.jamieoliver.com/recipes/meat-recipes/grilled-fillet-steak-with-the-creamiest

Bits and Bobs:
use a tender cut of meat and don't over cook it as I've done here; in general the more tender the cut of meat the shorter the cook time; the leeks were wonderful in this dish. I sweat them for 20 min in a cast-iron casserole; I used a California Moscato wine for the beans; Moscato is a white wine perfectly suited for a summer evening.
-M