In a large bowl combine the cheeses and cornstarch and toss to coat.
Rub
the inside of a heavy saucepan with the garlic and discard the
garlic. Add
the wine and lemon juice and bring the mixture to a boil. Stir in the
cheese mixture gradually over moderate heat, stirring until smooth.
Stir in the kirsch, if desired. Season with pepper and nutmeg. Simmer
mixture for 2-3 minutes and transfer to a fondue stand set over a low
flame. Serve immediately, taking care to remember to continually stir
the
fondue to prevent it from separating.