To do this

1. Preheat the oven to 125 C.

2. Dry the leftovers by putting the filter basket upright

in a bowl for five minutes. Then use a spoon to

squeeze out as much liquid as you can from the leftovers.

3. When the residue looks dry, take out the contents of the filter basket

with a spoon and spread out on baking paper on a baking tray.

Spread the mixture into a thin layer on the baking tray.

4. Place the tray in the oven and leave for 1 - 2 hours

(depending on how dry your leftovers were).

5. Remove the tray from the oven and leave to cool. Scrape

the dried leftovers from the baking tray paper.

6. Put the leftovers in a blender and run the blender until

the contents look like flour.