Slice potatoes thin, dry well on paper towels.
Place in large bowl with other ingredients and mix thoroughly, making sure each slice is well coated. Add additional oil if necessary to coat all slices but limit yourself to only 2 more tablespoons.
Spread potatoes on cookie sheet in 2-3 layers and bake at 425 ° for 35-40 minutes. Top layer should be crisp and golden. Texture of lower layers will be softer.
Cut into squares, remove with spatula and place directly on individual serving plates.