Heat oven to 200C/180C fan/gas 6. Put the breadcrumbs, olives, parsley, mint, lemon zest, anchovies and garlic in a food processor, and blitz until everything is roughly chopped. Tip into a bowl and stir through the pine nuts, sultanas, chilli flakes (if using) and a good grinding of black pepper. Arrange the fennel slices in a small roasting dish and drizzle with a little olive oil