Just remembered one. Its not quite food, but whenever I order this at a bar I get dirty looks..
Get a pint glass and make a Lager Shandy. But don't use lemonade, use Coke instead!. Yum! 1/4 beer, 3/4 coke makes best consistency.
Edit: Just found out via google that someone has had this idea before me and its even got the name "Diesel" (after the colour it turns).
I have others but i dont know if drinks count in this thread so ill leave it as this for now
