Preheat oven to 375°F (190°C).
In a large skillet over medium heat, cook ground beef until browned, breaking it apart with a spoon, about 5-7 minutes.
Add diced onion and minced garlic to the skillet and cook until onion is translucent, about 3-4 minutes.
Stir in frozen mixed vegetables and cook for 2 minutes until slightly softened.
Add condensed cream of mushroom soup, beef broth, Worcestershire sauce, salt, and black pepper to the skillet. Stir well to combine and simmer for 5 minutes.
Transfer the beef mixture to a 9×13 inch casserole dish and spread evenly.
Sprinkle shredded cheddar cheese evenly over the beef mixture.
Arrange frozen tater tots in a single layer on top of the cheese.
Bake in the preheated oven for 30 minutes, or until tater tots are golden brown and crispy.
Remove from oven and let cool for 5 minutes before serving.