Toss the grated cheese in the cornstarch, evenly coating all the cheese.
In a heavy saucepan bring the wine, garlic and lemon juice to a simmer. Add the coated cheese a handful at a time, gently stirring each handful to a smooth melted cheese sauce consistency.
Once smooth, stir in the mustard, nutmeg and salt and pepper
Transfer to your fondue dish and serve with breads, vegetables and grilled meats.