1. Preheat the Oven
Start by preheating your oven according to the temperature recommended on your tater tot package. Having the oven fully heated before the casserole goes in helps the tots cook more evenly and develop a crisp exterior.
Lightly grease a suitable baking dish to make serving and cleanup easier.
2. Cook the Ground Beef and Onion
Place a large skillet over medium heat and add the ground beef and chopped onion.
Cook until the beef is browned and the onion has softened. Break the beef apart with a spatula as it cooks so you end up with small, evenly distributed pieces throughout the casserole.
Season the mixture with salt and black pepper according to your taste.
If there is a significant amount of excess fat in the skillet, carefully drain it before continuing.
3. Add the Creamy Soup
Reduce the heat and stir the cream of mushroom soup into the cooked beef mixture. Mix until the soup is distributed evenly and the beef is coated in the creamy sauce.
There is no need to cook the mixture for an extended period at this stage. You simply want the ingredients to combine before transferring them to the baking dish.
4. Build the First Layer
Spread the beef and mushroom mixture evenly across the bottom of your prepared baking dish.
Use the back of a spoon or spatula to create an even layer. This helps ensure that each serving contains a balanced amount of beef and creamy sauce.
5. Add the Cheese
Sprinkle the shredded cheese evenly over the beef mixture.
Try to cover most of the surface rather than placing all the cheese in one area. As it melts, the cheese will create a rich layer between the creamy beef and crispy tater tots.
6. Arrange the Tater Tots
Place the frozen tater tots on top of the cheese in a single, relatively even layer.
You can arrange them in neat rows if you want a more uniform appearance, or simply spread them across the surface. Keeping the tots from being heavily stacked helps them brown and crisp more effectively.
7. Bake the Casserole
Place the baking dish in the preheated oven and bake according to the tater tot package directions, or until the casserole is hot and bubbling and the tater tots are golden and crispy.
The exact baking time can vary depending on the brand of tater tots, the size of your dish, and your oven. Keep an eye on the topping during the final part of baking.
8. Let It Rest
Once the casserole is finished, carefully remove it from the oven and allow it to rest for several minutes.
This short resting period allows the bubbling cheese and creamy filling to settle slightly, making the casserole easier to scoop and serve.
9. Serve
Scoop generous portions onto plates and serve while the casserole is warm. Make sure each serving gets plenty of crispy tater tots, cheesy filling, and seasoned beef.