In a medium sized bowl, combine the three cheeses and toss with the flour.
In a deep heavy bottomed pot with high sides, add the garlic and wine. Heat over medium heat until hot, but not boiling. Stir in the lemon juice.
Add a handful of cheese at a time to the wine mixture, stirring constantly and not adding more cheese until the previous has melted, bubbling gently and has the appearance of a light creamy sauce.
