Place a large baking tray in the oven and preheat to 230 degrees Celsius. Make the olive and walnut stuffing by placing all the ingredients in a food processor and pulsing until very finely chopped.

I sometimes consider perch the consolation fish. More often than not, they are happy to swallow a waxie, no matter the hour or what else is biting, just so we fishermen can believe there was a reason ...