Peel and chop the onions. Wash, clean and slice the mushrooms. Heat oil in a pan and fry deep-frozen mini meatballs while turning. Add onions and mushrooms and fry. Pour in broth, add peas and roots and bring to the boil.
Cover and cook for about 10 minutes. Stir in sauce thickener and frozen herbs and bring to the boil again briefly. Season with salt and pepper and arrange on plates. Serve garnished with parsley