Runny cream? WTF is that... You don't mean liquid cream like you might put in tea/coffee etc? If so - WTF is wrong with you? In a sandwich - are you mad?

That said, I used to like (still do actually) strawberry jam and cheese sandwiches

Going back to your rice pudding and banana's in custard - not liking the rice pudding, but banana in custard is great....

As is ice cream in custard! Specially Rasperberry Ripple covered with Ambrosia custard!