QUICHE IN A CUP - She Put Eggs And Bread In A Coffee Mug. When She Flips It Over? I Ran To The Kitchen! If you’ve got some leftover veggies, a little bit of cheese, and an egg, you can make this quick and simple quiche in a mug. Chop up your veggies, whisk an egg, throw in some old pieces of bread, microwave everything for a couple of minutes, and voila! It’s the perfect after-school snack, or a highly satisfying meal for one!