Pour any excess oil mixture over the top and bake for 1 hour. To serve, sprinkle with the chopped nuts and if using the Parmesan, sprinkle it over and broil for about 1 minute until golden.
Once the beans and tomatoes have had their time in the oven, nestle the salmon fillets among them and bake for a further 8 minutes. Set aside for 5 minutes, out of the oven, to rest. While the ...