European Kitchen - Potato gratin

Potato Gratin

4-6 potatoes

4 tablespoons butter

1 1/2 cups cooking cream

1 cup milk

2 cups grated cheese (mozzarella or Parmesan)

Salt

Black pepper

Nutmeg

Paprika

Garlic powder

1 tablespoon mustard

Dried thyme

Green onions for garnish