Mix the jam, oil, garlic and rosemary. Brush the spare ribs with the mixture, cover and leave to marinate in the fridge for approx. 12 hrs.
Wipe the marinade from the meat and set aside. Salt the meat, place on a grill tray, grill the ribs over/on a medium heat (approx. 200 °C for approx. 50 mins. all over. Brush the meat every so often with a little of the reserved marinade and turn.