In a large bowl, julienne or shave the kohlrabi (after peeled), the apple and carrot. Sprinkle with salt, add toss together with a few splashed of vinegar. Rough chop walnuts and toss the whole bit together again. Let sit for at least 10 minutes, if not longer before serving. (A great salad to make ahead of time)
Eat as is, or toss onto a bed of greens, plate of rice or a bowl of lentils.
Any left overs only end up tasting better the next day.