4 John Dory fillets (ask the fishmonger for the bones to make the stock)
Salt and freshly ground black pepper
50g plain flour
2 tbsp olive oil, plus extra to serve
1 lemon, halved
1 tsp Worcestershire sauce
2 small gherkins, finely chopped
2 tbsp capers: 1 tbsp finely chopped,1 tbsp whole
2 tomatoes, peeled, deseeded and finely chopped
3 tbsp Tomato sauce
250ml Fish stock
Small handful flat-leaf parsley, chopped
FOR THE TOMATO SAUCE: Makes about 600ml
6 tbsp olive oil
20g/4 cloves garlic, finely chopped
1kg well-flavoured tomatoes, peeled, or 2 x 400g tins tomatoes
FOR THE FISH STOCK: Makes about 1.25 litres
1 onion, chopped
1 bulb fennel, sliced
100g celery, sliced
100g carrots, sliced
25g button mushrooms, washed and sliced
Sprig thyme
2.25 litres water
1kg flatfish bones (such as brill, sole, plaice) or fillet