Mix together beef, onion and breadcrumbs. Season meat mixture with salt
and pepper and divide into 30 balls. Flatten each ball out. Place a piece of
cheese in center then mold meat around cheese, sealing it well to enclose cheese
To make the tangy sauce, put tomato paste, wine, vinegar, honey, mustard,
Worcestershire sauce and stock into a saucepan and simmer for 10 minutes.
Blend flour smoothly with orange juice then stir into the sauce and simmer
for 1 minute, stirring constantly.