divide ribs into 4 portions, place in a shallow dish, pour marinade over ribs, turn ribs to coat with marinade. cover and refrigerate for several hours or over night.

place ribs in a baking tray, bake in moderate oven for about 30 mins or until cooked through, brushing with a little of the reserved marinade during cooking.

for sauce, place remaining marinade in a pan, bring to boil, then simmer uncovered for about 5 mins or until onion is soft. serve ribs with sauce