1.Cut between bones of pork to separate into individual ribs. Combine garlic, paprika and olive oil in a small bowl; rub over pork ribs. Preheat oven to moderately low, 160°C (140°C fan-forced).
2.Add chorizo to a large heated flameproof baking dish; cook, stirring, until browned lightly. Remove from the dish with a slotted spoon; drain on absorbent paper.
3.Add ribs to same dish in batches, cook until well browned all over. Remove ribs from dish, drain on absorbent paper.
4.Add extra olive oil, onion and capsicum to dish, cook, stirring, until onion is soft. Return ribs and chorizo to dish; add brown sugar, undrained tomatoes and stock, bring to the boil.
5.Cover dish tightly with foil, bake in a moderately slow oven for 1 hour. Remove foil, bake for a further 30 minutes or until ribs are tender. Season to taste with salt and pepper.