Preheat oven to 375°F (190°C).
In a large skillet, cook the ground beef over medium heat until browned. Drain excess fat.
Add diced onion and garlic to the skillet, cooking until softened.
Stir in tomato paste, Worcestershire sauce, dried thyme, salt, and black pepper.
Sprinkle flour over the beef mixture and stir well.
Pour in beef broth and mix until thickened.
Add frozen vegetables and stir until well combined.
Transfer the mixture to a greased 9x13-inch baking dish.
Spread shredded cheese evenly over the beef and vegetable mixture.
Arrange frozen tater tots in a single layer on top.
Bake for 35-40 minutes, or until the tater tots are golden brown and crispy.
Let cool for 5 minutes before serving. Enjoy!