In a saucepan, bring wine to a boil and add minced garlic.
Boil mixture until reduced to 3 tablespoons.
Turn down the heat and add Mascarpone and stir until melted.
Add half & half cream and heat until almost boiling.
Remove pan from heat and add shredded Fontina slowly, a small amount at a time, stirring constantly until cheese melts and mixture is smoothly blended.
If needed, return pan to low heat to melt the cheese.
Remove from heat and season with salt and white pepper.
Stir well before using.
If made ahead, refrigerate fondue in covered storage container.
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