This dish represents the layers of secrets that are slowly uncovered as the plot of 'All the Colours of the Dark' unfolds, much like the layers of a shepherd's pie.
Preheat oven to 350°F.
In a skillet, heat olive oil and cook onions until translucent.
Add ground beef, peas, and carrots, and cook until beef is browned.
Stir in beef broth and simmer for 5 minutes.
Transfer mixture to a baking dish and spread mashed potatoes over the top.
Bake for 25 minutes or until top is golden brown.