In the same pan, melt the butter for the gravy. Whisk in flour once melted and cook for 1-2 minutes to make a roux.
Deglaze with the white wine and gradually whisk in beef broth while stirring constantly to avoid lumps. Add the cream, bay leaf and some lemon juice if you want a bit of freshness.
Re-add your meatballs to the pan and let simmer for about 5-10 minutes, to soak up the flavours.
Serve hot with mashed potatoes or buttered noodles and lingonberry jam !