Fish pie

INGREDIENTS

• sea salt
• freshly ground black pepper
• 1 kg potatoes
• 1 carrot
• 2 sticks celery
• 150 g good-quality Cheddar cheese
• 1 lemon
• ½ fresh red chilli
• 4 sprigs fresh flat-leaf parsley
• 300 g salmon fillets, from
• , ask your fishmonger, skin off and bones removed
• 300 g undyed smoked haddock fillets, from
• 125 g raw peeled king prawns, from
• , ask your fishmonger
• olive oil
• 1 good handful spinach, chopped, optional
• 2 ripe tomatoes, quartered, optional