Potato Chips with Creme Fraiche and Caviar

Preheat oven to 375 degrees F. Brush 3 large baking sheets generously with some oil. With a mandoline or other manual slicer cut the potatoes crosswise into 1/8-inch thick slices. Arrange slices in 1 layer on a baking sheet and brush with some remaining oil. Sprinkle potatoes with rosemary , salt and pepper. Repeat these steps for remaining 2 baking sheets. Bake slices in middle of oven until golden, 15 to 20 minutes. With a metal spatula immediately transfer to a rack to cool completely. Top potato chips with 1 teaspoon each of caviar and creme fraiche.