Heat oven to 220C/200C fan/gas 7.
Put the peppers, onions, tomatoes and
olives into a large, deep baking tray
and cook for 15 mins until they start
to soften and char at the edges.
Stir in the passata, butter beans and seasoning, then
make 4 little areas and nestle in the
cod. Return to the oven and cook for a
further 15 mins until the cod is cooked
through. Sprinkle over the basil and
serve with crusty bread, if you like.