Use a small pot and place on low heat. Add the vinegar along with the salt and sugar and bring up to a boil while stirring every now and then for the salt and sugar to dissolve. Remove from the heat and allow to cool a bit.

Clean a large mason jar and add into it the cut kohlrabi along with the ginger, garlic, star anise, peppercorns and allspice berries. Pour the vinegar all the way to the top and close tightly.

Refrigerate and start enjoying them after 2 days.