It sounds like a culinary rendition of "Ebony and Ivory", and costs about as much as a baby grand. I speak of none other than the blockbuster meal that is set to take place at Per Se on November 11—20 courses alternating the exacting classicism of Thomas Keller with the forward-thinking plates of Alinea’s Grant Achatz for $1,500 (on the bright side: wine, tip and taxes are included). The meal honors "the mentor and protégé," per the press release—a reference to Achatz’s time at French Laundry, no doubt—and will include signed copies of Achatz’s new book, Alinea, and Keller’s Under Pressure. Though the menu’s not set, says Achatz, who gave us the scoop: "Likely it will include a few Alinea and Keller classics, like the oysters and pearls from him and the hot potato-cold potato from me…with a few new ones in the mix." For reservations, call Isabelle Brochard at 212-823-9450.