For the Erdäpfelgröstl, sauté the spring onion in a little oil. Add the mushrooms and fry them vigorously. Add salt and pepper.
Add some butter to the mushrooms and add the potatoes as well. Roast everything again.
Finally, add the parsley and season to taste.
Preparation Tip:
A green salad goes wonderfully with the Erdäpfelgröstl. Of course you can also use other mushrooms