Ingredients: olive oil 2 onions , peeled and roughly chopped 4 sticks celery , trimmed and roughly chopped 5 cloves garlic , peeled and roughly chopped 3 beef tomatoes , roughly chopped 500 g potatoes , peeled and cut into 3-4cm chunks 3 bay leaves 1 litre organic vegetable stock sea salt freshly ground black pepper 700 g fresh fish fillets , scaled and de-boned 1 lemon , juice of 1 small bunch fresh flat-leaf parsley , roughly chopped 1 small bunch fresh dill , roughly chopp