Alex Guarnaschelli is pushed to the limit when she's challenged to create a burger with falafel and latkes. After midnight, she lets it all hang out with a doughnut breakfast sandwich.

Alex Guarnaschelli has a few tricks up her sleeve -- and in the pantry -- as she takes on a tough cart to make an Asian fusion dish without any of the obvious ingredients. Then she faces an ooey-gooey conundrum: how to make something melty with cheese that doesn't melt.