Preheat oven to 300 degrees.
Add the potatoes, parsnip and rutabaga to an oven proof dish. Mix the vegetables. Place the garlic and bay leaves in between.
In a bowl or glass, combine milk and cream. Season with nutmeg and salt and pepper to taste. Mix in half the cheese and pour the mixture over the potatoes.
Bake in the oven for 1 hour. Sprinkle with the rest of the cheese, turn the heat up to 350 degrees and bake for 15-20 more minutes, until the cheese is nice and brown.