Sfogio in Saor (soused sole)

all purpose flour for dusting
1 kg small whole sole, cleaned
vegetable oil for deep frying
1 kg onions
500 ml olive oil
250 ml white wine vinegar
500 ml dry white wine
90 gr. golden raisins
60 gr. pine nuts
2 bay leaves
pinch of white peppercorns
pinch of salt
lightly flour the fish. Deep fry the fish in hot oil for 3 to 4 minutes or until golden
in a medium saucepan, combine the onions and olive oil and cook until the onions are slightly browned. add the vinegar, wine, raisins, pine nuts, bay leaves, peppercorns and salt. Stir thoroughly and cook for 15 minutes.
Layer the fried sole in a deep dish, alternating with layers of the sauce. set aside to rest for several hours before serving