Heat the oven to 200C/180C fan/gas 6. Drizzle the oil into a deep roasting tin and put in the oven to heat up. Bring a pan of salted water to the boil and boil the parsnips for 4-5 mins until starting to become tender. Drain well and steam-dry for 8-10 mins.

Tip the parsnips into a bowl, pour over the miso and maple syrup, and season well. Stir well to coat the parsnips in the glaze. Remove the tin from the oven and carefully tip in the parsnips, basting them in the hot oil before roasting for 20 mins. Remove from the oven and baste again, then roast for another 10-20 mins until golden.