Rub inside if fondue pot with garlic clove. Pour in wine and lemon juice; cook over medium heat until bubbly. Turn heat to low and gradually stir in cheeses with a wooden spoon. In a small bowl blend cornstarch with kirsch. Blend into cheese and continue to cook, stirring, 2 to 3 minutes or until mixture is thick and smooth. Do not allow fondue to boil. Season with white pepper and nutmeg. Serve with bread cubes.