1. In an earthenware fondue pot, toast the black pepper over medium high heat until fragrant.
2. Add the white wine, garlic and bay leaf. Reduce the wine by 1/4 and add the cream, and bring to a boil, then add the carbone alfredo sauce and bring to a simmer.
3. Add the fontina and whisk until fully incorporated, then thicken with the cornstarch and water mixture.
4. Season with lemon juice,
and a pinch of salt.
5. Finish with grappa if desired.