Preheat the oven to 400°F (200°C).
In a large skillet, brown the ground beef over medium heat.
Add diced onions and garlic; sauté until translucent.
Stir in diced carrots and chopped mushrooms; cook for 5 minutes.
Pour in beef broth and Worcestershire sauce; bring to a simmer.
Add thyme, salt, and pepper; cook until mixture thickens.
Roll out the pie crust and place in a pie dish, trimming excess.
Pour the meat filling into the crust, spreading evenly.
Cover with another pie crust; seal and cut slits for steam.
Bake in the preheated oven for 30-35 minutes, until golden brown.