Preheat the oven to 425°F (218°C). If using an oven-safe skillet you can cook in it; otherwise plan to transfer the filling to a 9x13-inch baking dish.

Heat a large oven-safe skillet over medium-high heat. Add the ground beef, diced onion, and minced garlic, breaking the meat into pieces as it cooks. Continue until the beef is fully browned.

Sprinkle the flour over the cooked meat and stir well to coat; cook for about 1 minute to remove the raw flour taste.

Pour in the condensed beef consommé and the milk, stirring to combine. Bring the mixture to a gentle simmer and cook until the sauce thickens.

Stir in the Worcestershire sauce and frozen mixed vegetables, folding everything together until evenly distributed. Taste and season with salt and pepper as desired.

Spread the beef-and-vegetable filling evenly in the prepared 9x13-inch baking dish (or keep in the oven-safe skillet). Sprinkle the shredded cheddar cheese evenly over the top of the filling.

Arrange the frozen tater tots on top of the cheese in a single layer, starting at the outer edge and working inward so the surface is completely covered.

Bake in the preheated oven for 25 to 30 minutes, or until the tater tots are golden brown and the filling is bubbling around the edges.

Remove from the oven and allow the casserole to rest a few minutes before serving. Serve warm and enjoy.