You saw the peeler trick. But why even bother cutting 2 mm slices? It is not just about making your plate look pretty.
Cutting vegetables this thin maximizes surface area. Toss them into a hot wok and they flash-cook in seconds while keeping their snap. More surface area also helps dressings and marinades coat the pieces. But – you still need a wickedly sharp blade, because a dull edge tends to squash delicate ingredients instead of slicing cleanly.
Thin cuts change the cooking. Small, even pieces heat through more quickly and consistently than thick ones. In stir-fries, that can help vegetables cook fast while retaining a little crunch. Extra exposed surface also gives dressings and marinades more contact with each piece.
Aim for consistent thickness rather than chasing an exact two-millimetre measurement every time. Use a sharp knife, a secure board, and a controlled cutting motion. A peeler or mandoline can help with very thin slices, but always protect your fingers.