In a small bowl, add the Gruyére, raclette and fontina cheeses. Stir to combine and set aside.
Place a metal bowl over a saucepan filled with 2 inches of water. You may also want to use a conventional double boiler.
Bring the water to a boil over high heat.
Reduce the heat to medium and add the wine, then place a fork inside the metal bowl.
Add the chopped garlic, then stir with the fork to incorporate the ingredients.
Add ⅓ of the cheese and mix thoroughly using the fork.
Add the next ⅓ of the cheese and mix thoroughly using the fork.
Add the remaining ⅓ of cheese and mix thoroughly until all the cheese is melted and incorporated, using a whipping motion to fluff up the cheese.
Add one full squeeze from the lemon and the pepper and nutmeg. Fold and stir with the fork to combine.
