1. Heat oven to 375 degree F. Brush 2 large cookie sheets with 1 teaspoon oil. Arrange potato slices in one flat layer on prepared sheets. Brush potatoes with remaining oil and bake until golden, checking often since they brown at different rates, about 15 to 20 minutes. Transfer to paper towels and sprinkle with rosemary and salt while hot. Makes 4 servings.