1 litre plain double cream yoghurt
1 tin condensed milk
200g tennis biscuits, crushed
Press the biscuits into an even layer at the bottom of a deep microwave-safe dish.
Mix the condensed milk with the yoghurt and carefully pour the mixture over the biscuit base.
Smooth the top, then microwave on high for 5 to 6 minutes, or until set.
Refrigerate until cool, then slice to serve.