Remove the root and tip of the kohlrabi, and peel using a veggie peeler. Make your noodles, you can do this using a spiralizer (as I did), or with a mandoline using the matchstick blade (although this is more difficult). If using a spiralizer, cut your noodles so the strands aren't crazy long.
In a large pan over medium heat, add the pine nuts, and toast, stirring constantly until they start to turn golden. Remove golden pine nuts to a plate and set aside
Add the butter to the same pan. Once melted, add the garlic and saute until fragrant. Add the kohlrabi noodles, salt, pepper, and red pepper flakes, and toss to combine. Cook for 8-10 minutes, I find kohlrabi noodles are best a little al dente, otherwise they get soggy.
Remove from heat, and stir in the parmesan. Sprinkle with toasted pine nuts before serving, and enjoy!