Peel the kohlrabi heavily and slice in half length-wise. Thinly slice into half-moons and then into matchsticks.

Place kohlrabi in a medium bowl and add juice of 1/2 lemon. Toss gently to prevent browning.

Thinly slice onion into quarter moons. Add chopped parsley and onion to the kohlrabi and sprinkle with salt.

Gently toss to combine.