Peel or clean the onion, garlic and mushrooms and dice finely. Steam everything together in the melted butter until translucent and allow to cool slightly.
Cut the toast into small pieces and pour the milk over it. In a large bowl, place the minced meat, spices, mustard, Worcester sauce and eggs. Gently squeeze out the toast and add. Finally add the mushroom and onion mixture and mix everything well with your hands. Now shape small to medium-sized balls (meatballs) from the mixture and cover and chill for 30 to 60 minutes.
Heat the plant cream and fry the meatballs all around for about 10 minutes.