What It's Like to Cook for Daniel Boulud's Wedding

This past June, Daniel Boulud, whose three-star Michelin restaurant Daniel just turned 20, remarried. Boulud, 58, tied the knot with former employee Katherine Gage, 30, at the Glenmere Mansion in upstate New York. The reception, according to those who took part, was as extravagant and exquisite as a dinner at Daniel. Among the invited guests: Thomas Keller and Eric Ripert.

Boulud's catering...