A mandolin is an ideal tool to:
- Slice potatoes for a Gratin Dauphinoise.
- Slice radishes evenly for a salad.
- Slice carrots Julienne.
Julienne is the name of finely sliced vegetable (or meat), with pieces 1 - 3 mm thick and 3 - 4 cm long. Of course you can slice Julienne by hand, but it is much harder to get consistent in size (and doneness when cooked).