Peel and wash the kohlrabi, cut into fine sticks, cover and cook in slightly salted water for about 8 minutes, then drain on a sieve.
Peel and finely dice shallots. Heat the butter in a pan and sauté the shallot cubes in it. Add kohlrabi sticks, toss in them for about 2 minutes and season with salt, pepper (can also be refined with nutmeg) and tarragon.