One time I was so broke the only thing I could afford was to sing lead and back up vocals of the chorus from Madonna's "Gonna Dress You Up in My Love" into a hot cup of nothing.
Also, order a McDouble, add lettuce and Mac sauce BOOM! Bic Mac no seeds, no pesky middle bun.
Not exactly a meal, but I seem to get by on tortilla chips and salsa more frequently than I'd like to admit.