Mixed fish grill with lemon couscous

INGREDIENTS

• 4 lemons
• 1 large red onion, or 2 small red onions, peeled and halved
• 1 clove garlic, peeled
• 1 large bunch fresh flat-leaf parsley, stalks reserved
• 300 g couscous
• extra virgin olive oil
• 600 ml organic vegetable stock, hot
• sea salt
• freshly ground black pepper
• 2 sea bass fillets, from
• , ask your fishmonger, skin on and pinboned
• 4 red mullet fillets, from
• 1 bunch fresh mint, leaves picked
• 12 large raw king prawns, from
• , ask your fishmonger, shelled and deveined
• 1 large handful clams , from
• , ask your fishmonger, cleaned
• 1 large handful mussels, from
• 1 pinch cinnamon
• 400 g tinned plum tomatoes
• 1 jar roasted red peppers, drained