The very best for my taste is grilled slowly in the husk over coals. Second best is wrapped in foil, in the husk, and buried in the coals of a campfire for 15-20 minutes, less for a really hot bed of coals. Totally cover from contact with air or the uncovered section will scorch.
The fastest and only way we do corn in our kitchen is microwaved in the husk for 3-4 minutes depending on size of the ear. I stop and turn it over once at 2 minutes.
