This pie's layers symbolize the many lives Nora explores, each one a combination of different experiences stacked upon each other akin to the pages of her potential lives in the Midnight Library.
Preheat oven to 375°F.
Cook ground beef and onion in a skillet until browned.
Stir in flour, mixed vegetables, beef broth, and Worcestershire sauce.
Cook until thickened, then transfer to a baking dish.
Spread mashed potatoes over the top.
Bake for 25 minutes or until the top is golden.