heat the 2 cups of milk in the microwave on high for 4-5 minutes. Stir half way through
wisk in the corn starch, sugar, salt into the milk and microwave on high for another 3 minutes, stirring half way through
slightly beat the 2 eggs. Stir half of the hot mixture into the eggs while wisking and then stir the egg mix back into the remaining milk mixture. (this to prevent the eggs from cooking to a gloopy mess)
microwave the mix for another 1 1/2 - 2 minutes
stir in the butter and vanilla
cover the bowl with cling wrap and cool in an ice bath till cooled (to prevent browning the bananas). Stir occasionally.
line a bowl artfully with vanilla wafers and alternate layers of the mix, bananas, and more vanilla wafers. I like lots of wafers.
place covered in the fridge till well chilled and nom on down