Quarter the squash lengthwise and remove all the pith and skin. Cut into segments around a centimetre thick. Add the ginger, cumin and chile and a couple of pinches of salt to around four tablespoonfuls of olive oil and stir until amalgamated. Use your hands to cover the squash with the spicy oil, put in an ovenproof pan and cook at 400°F/200°C/Reg6 for 20 minutes or so until just tender
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