Cook the ribbon noodles in boiling salted water for about 8 minutes until al dente. Clean and wash spinach thoroughly. Peel and finely chop the onion. Fry the diced onion in oil. Add leaf spinach and steam for about 5 minutes.
Season with garlic powder. Heat the bean sprouts briefly. Stir in sour cream. Season with salt, pepper and nutmeg. Pour the sauce over the pasta and serve sprinkled with parmesan cheese.