NOTE: Making the fondue takes less than 10 minutes so be sure to arrange bread, grapes and vegetables on platter before making fondue, because once fondue is done, you should serve it immediately.
In fondue pot, or small heavy saucepan, heat white wine with garlic over high heat until boiling.

Combine lemon juice with cornstarch in small bowl and then stir into boiling wine. Cook for 1 minute while stirring. Reduce heat to medium and stir in cheese. Keep stirring until all cheese has melted. Fondue should look thick and shiny. Turn off heat and stir in seasonings as desired. Place over fondue warmer and serve.