Kohlrabi is a good source of vitamin C; it makes a great stand-in for celery in this riff on Waldorf salad.
Whisk together canola mayonnaise, apple cider vinegar, honey, and black pepper in a large bowl. Add kohlrabi, peeled and cut into thin strips; 1 small Fuji apple, unpeeled and thinly sliced; and thinly sliced scallion. Toss to coat. Top with shaved aged Gouda cheese.