Gates also eluded Noel Godin, who's slapped the Wizard of Redmond with a tasty custard pie on a previous trip to the Benelux country.

FORBES: Gates Ducks Questions, Pies; Forsee May Replace Sprint's Esrey.

If the foundation of a pie especially a custard pie like a pumpkin pie is too dry or too wet, it could crumble apart or slide off forks.

NPR: A Thanksgiving Meal From The Test Kitchen

"When you bake a custard pie a pumpkin pie is custard, because it has dairy and eggs you don't want it to be fully set in the center, " Kimball said.

NPR: A Thanksgiving Meal From The Test Kitchen

Key limes are yellow, and that is the colour of an authentic Key lime pie, which is nothing more than a custard of Key lime juice, sweetened condensed milk and egg yolks in a cracker crust, then topped with meringue or whipped cream.

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