Shred all cheeses and set aside. Rub the inside of a saucepan (or inside of a heavy-bottomed pot) with the cut garlic clove. If you enjoy garlic, you can break tradition, mince the garlic finely, and add this to the saucepan as well. Then add dry white wine and lemon juice. Warm over medium heat until steaming, never boiling.
In a large bowl, toss grated Gruyère and Emmental with cornstarch. This step is crucial for making cheese fondue properly since it will prevent clumps and ensures a smooth fondue cheese recipe.
Once wine garlic mixture begins to steam, reduce to medium-low heat. Add one handful of the cheese at a time, stirring constantly. Wait until fully melted before adding more. This process takes about 5-7 minutes.
Stir in cherry brandy, Dijon mustard, nutmeg, and black pepper. Transfer to your fondue set and keep over a low flame. Stir occasionally to prevent sticking at the bottom of the pot. Enjoy!