2 garlic cloves, crushed and chopped
1 onion, finely sliced
1 green pepper, very finely sliced
2 tbsp chopped fresh tarragon
100g/3陆oz black olives, stones removed
250ml/9fl oz passata
salt and freshly ground black pepper
3 tbsp flour, for dusting
100ml/3陆fl oz fish stock
1 tbsp vegetable oil
25g/1oz butter
4 x 150g/5oz haddock fillets
200ml/7fl oz red wine