Fry K&N's Croquettes as per instructions on label and set aside.

Melt margarine in a separate pan, add garlic and sauté for about half a minute.

Add black mushrooms, vinegar, yellow mustard, cream, chicken stock and basil, while stirring continuously.

Let simmer and add basil leaves to serve.

In a platter, arrange Croquettes and pour sauce over them to serve.