The perfectly "boiled" egg isn't boiled it all... it's baked. This
recipe requires an exact oven setting.

Place as many eggs as you'd like in an oven pre-heated to exactly
149°. Bake for at least an hour or longer.. it doesn't matter beyond
that point.
The egg(s) will be unlike any you've ever eaten. The white will be
delicately set and smooth as custard, and the yolk will be orange and
soft. Kev

See: "Cooking For Eggheads" Discover magazine February 2006 issue