I'm sorry I haven't had time to read all the others but here's mine...

One packet of Chocolate bicuits (the type completely covered with choc)

Some butter

Half a tin of condensed milk (the thick gloopy stuff)

One small carton (tub) of Philidephia cheese

One Lemon (of course!) juice and guts not peel

An expanding sandwich cake tin

This is what you do... Whizz the biscuits in a food processor till they are crumbs. Pour into a bowl with some melted butter. Pour all of that into the cake tin and press it not only across the bottom of the tin but thickly up the walls as well. Put it in the fridge while you...
whizz up the other ingredients (cheese, lemon stuff and gloop) in the processor, pour that into the cake tin on top of the biscuits. It will be runny. Don't worry it sets within ten mins. You can put fruit of your choice on the top, or dribbled melted choc.

I have a friend who chefs in a hotel and this he sells at £2.50 per slice!