Banoffee pie!
Get a tin of condensed milk. Put it in a pan of boiling water and leave it there for about 3 hours.
Scrumble some digestive biscuits, mix with a little melted butter and use it to line the bottom of a shallow dish. press down firmly.
Cover biscuit layer with sliced banana.
Retrieve tin from hot water, carefully. Open, carefully. Pour/scoop yummy brown sticky toffee-like stuff over the banana layer and smooth over.
Mmmmmm.