Clean, wash and chop the soup greens and fry in 1 teaspoon of oil. Add bay leaf. Then deglaze with 1 l water, bring to the boil. Dissolve the stock. Simmer for 20-30 minutes.
Cook the spaetzle in boiling salted water for 10-12 minutes. Drain mushrooms, cut them into smaller pieces if necessary. Peel and finely chop the onion. Cut roast beef into strips
Sieve the broth. Drain the spaetzle. Heat 1 tsp. oil. Lightly fry the onion and mushrooms. Deglaze with the broth, bring to the boil. Season with salt and pepper. Add roast beef and spaetzle. Wash and chop the parsley and sprinkle over it