2 garlic cloves, finely chopped2 long red chillies, seeds removed, finely chopped2 tsp ground ginger3 tsp sweet paprika2 tsp dried oregano1/3 cup (80ml) olive oil, plus extra to brush4 limes, cut into wedges24 prawns, peeled (tails intact), deveined300g squid tubes, cut into 3cm strips400g swordfish fillets, cut into 3cm pieces4 corn cobsFlat-leaf parsley leaves, to serve