I doubled this recipe for our family Christmas dinner. I modified it by doubling the garlic and rosemary, and by adding a layer of shredded Gruyer (sp?) cheese between top and bottom layers of potatoes, then the parmesean on top. In order to be sure the potatoes were sliced consistently thin I used an inexpensive mandolin slicer set on the thinnest setting. Everything turned out terrific. Rich, creamy, cheesy, and very 'special occasion'feeling. The leftovers stored and heated well over several days, also. Great recipe!
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