Making Tater Tot Casserole can be a delightful experience if you follow these easy steps:

1. Preheat Oven: Preheat your oven to 400°F (200°C).
2. Cook Beef & Onion: In a skillet over medium heat, brown the ground beef with the diced onion. Stir occasionally until the beef is fully cooked. Drain excess fat if necessary.
3. Add Vegetables: Mix in the frozen mixed vegetables, stirring to combine them well with the meat.
4. Combine Ingredients: Add the cream of mushroom soup to the skillet. Mix everything until well-coated, and season with salt and pepper to taste.
5. Transfer to Baking Dish: Pour the meat and vegetable mixture into a 9×13-inch baking dish, spreading it evenly.
6. Add Cheese: Sprinkle the shredded cheddar cheese over the meat mixture.
7. Layer Tater Tots: Arrange the frozen tater tots on top of the cheese in a single layer.
8. Bake: Place the casserole in the preheated oven and bake for 30-35 minutes, or until the tater tots are golden brown and crispy.
9. Cool & Serve: Once cooked, let the casserole cool for a few minutes before serving.

Follow these steps, and you will create an amazing Tater Tot Casserole that impresses everyone at the dinner table!