Sprinkle the flour over the ground beef and vegetables and cook for 1 minute, stirring constantly. This will help thicken the gravy.
Gradually whisk in the beef broth, scraping up any browned bits from the bottom of the pan. Bring to a simmer and cook for 5 minutes, or until the gravy thickens slightly.
Stir in the Worcestershire sauce and dried thyme. Season with salt and black pepper to taste.
3. Assemble and Serve:
Spoon the mashed potatoes onto plates. Top with the ground beef and gravy. Enjoy!
