How do you make Au Gratin potatoes?

* 2 pounds potatoes (such as Russet or Yukon Gold), scrubbed and sliced into 1/4-inch rounds

* 1 cup heavy cream

* 1 cup milk

* 1/2 cup grated Parmesan cheese

* 1/2 cup grated Gruyère cheese

* 2 cloves garlic, minced

* 1 teaspoon dried thyme

* Salt and pepper to taste

Instructions:

1. Preheat oven to 375 degrees F (190 degrees C).

2. In a large bowl, toss the potato slices with the heavy cream, milk, Parmesan cheese, Gruyère cheese, garlic, thyme, salt, and pepper.

3. Pour the potato mixture into a greased 9x13 inch baking dish.

4. Bake for 30-35 minutes, or until the potatoes are tender and the sauce is bubbly.

5. Serve immediately.