1. Preheat oven to 425F. Spread an 11-by-7-inch baking dish or gratin dish with 1 tablespoon of the butter. Arrange half the potatoes in dish, sprinkle with half the garlic, drizzle with half the remaining butter, half the cheese, and half the salt and pepper. Repeat layers. Pour hot milk over potatoes.
2. Bake for 40 minutes or until potatoes are tender, milk is absorbed and top is browned. Serves 6.
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