Decked-out Swiss Roll

Directions

1. 1
   Place the yogurt in a fine-mesh sieve to strain for half a day.
2. 2
   Carefully remove any cellophane wrapping and unroll the Swiss roll.
3. 3
   If the yogurt sweetener is packaged separately from the yogurt, add to the yogurt and mix well.
4. 4
   Spread the yogurt on the unrolled sponge cake, and arrange your choice of fruit on top.
5. 5
   Re-roll the cake, using the cellophane that came with it to keep it neat.
6. 6
   Chill for an hour in the fridge, and it's done!