Kohlrabi "noodles" are the new Zucchini "noodle". That said, if you don't have a spiralizer, just cut the kohlrabi into sticks and continue on. You can also always use regular noodles too.
Heat a knob of butter in a large frying pan over medium heat until melted
Add the sliced onion and garlic with a big pinch of salt and black pepper and sweat until soft
Add the white wine and reduce by half
Add the mushrooms and sweat until tender
Add the cream, bring to a boil, reduce to a simmer and reduce by about 20%
Finish with the dill
In a separate pan, heat another knob of butter and add the kohlrabi noodles with a big pinch of salt and cook over low heat until slightly soft but still holding their shape, about 10 minutes
Top the noodles with the mushroom cream sauce and serve