How to Make It
Combine cornstarch and cheeses in a small bowl; toss to coat.
Rub cut sides of garlic on inside of a medium, heavy saucepan; discard clove. Add wine and milk to pan; bring to a simmer over medium.
Add one-third of cheese mixture to pan, stirring with a whisk until combined. Repeat procedure with remaining cheese mixture. Reduce heat to medium-low; cook 5 minutes or until smooth, stirring frequently.
Remove cheese mixture from heat; stir in lemon juice. Pour mixture into a fondue pot. Keep warm over low flame.