Preheat the oven to 400°F.

Into a large skillet over medium-high heat, crumble the ground beef. Use a spatula to break up the meat then add the onion. Cook for 5 minutes, stirring frequently until browned.

Sprinkle the meat with flour and stir to evenly distribute. Stir in the beef-style broth, milk, and Worcestershire sauce. Cook for 2 minutes, stirring occasionally until thickened.

Into a prepared 9x13-inch baking pan, spread the beef mixture in an even layer. Sprinkle with cheese then arrange the tater tots to cover completely.