Photograph: Kate Whitaker
Preheat the oven to 200°C, fan 180°C, gas 6 and line a baking tray with nonstick baking paper. Put the nuts on the tray and roast for 3 minutes.
Remove from the oven, drizzle over the maple syrup and sprinkle over the sea salt and chilli flakes.
Mix well then return to the oven for another 5-7 minutes until golden brown. Set aside to cool, then tip into a bowl to serve.