51�Թ�

If you pop a piece of greaseproof paper in between each, it's easier to get just one out when it's frozen, Caroline suggests.

Then place on greaseproof paper and leave at room temperature, exposed to the air.

I used 200g digestive biscuits, broken up and mixed with 100g melted butter, then pressed into a cake tin lined with greaseproof paper.

Put the aubergine cubes on a large oven tray lined with greaseproof paper, add three tablespoons of oil, half a teaspoon of salt and a good grind of pepper, and toss to coat.

“Lay them on greaseproof paper, freeze for two hours, then bag them and take out individual handfuls.”