Grate the havarti cheese and place in a bowl with the parmesan and cornstarch, toss together.
Slice garlic clove in half, rub the insde of the fondue pot. Discard. Warm the wine on low heat. When warm add 1 teaspoon lemon juice, add the cheese a little at a time. Once all cheese is melted serve immediately or ideally place over a flame to stay hot while dipping.