February 1997
U.S. Patent 4,623,551 to Claude Giddey and Georges Dové:
Method for the Fabrication of a Cheese Foam
In this invention, "cheese is melted under heating and an emulsion of air or a non toxic gas in an aqueous solution is incorporated therein, by providing a laminar and non-turbulent mixing under heating."
Kind of makes your mouth water, doesn't it?

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