To marinate the chops
Pour the balsamic into a pan along with all the other ingredients up to and including the pepper, mix thoroughly and bring to the boil while stirring, reduce the heat and simmer for approx. 3 mins., leave to cool. Cut a pocket in the side of each chop for the stuffing, brush with the marinade, cover and marinate in the fridge for approx. 1 hr.
Mix the cheese, tomatoes and pine nuts.
Wipe the marinade from the chops, set aside the marinade. Stuff the chops, secure with toothpicks, season with salt.
Cook on a high heat for approx. 1-2 mins. on each side. Push the meat to the edge or raise the grill rack then grill for 15-20 mins. on a medium heat until the juices are clear. Turn the chops regularly and brush with the reserved marinade.
Gas/electric grill: Cook on a very high heat (approx. 240 °C for approx. 1-2 mins. on each side, then finish cooking on a medium heat (approx. 200 °C for 15-20 mins.