The story behind "Tossed Salad and Scrambled Eggs"

Since I seem to be on a FRASIER jag (and I'm going up to Seattle Friday for the Mariners' home opener), here's a Friday Frasier question that deserves its own post. And a special guest to answer it.
Brian asks:

What's the story of the song "Tossed Salad and Scrambled Eggs" that Kelsey Grammer sings at the end of the show? Who wrote it? What does it mean? Who's idea was it to put it at the end

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