01 -
Preheat your oven to 350°F and carefully grease a 9x13-inch baking dish with butter or nonstick spray to ensure easy serving and prevent sticking.
02 -
Arrange the frozen tater tots in a single, even layer across the bottom of the prepared baking dish. This creates a crispy, golden base for your casserole.
03 -
In a large mixing bowl, whisk together the eggs, whole milk, salt, black pepper, and dry mustard (if using) until smooth and well combined with no streaks of egg white remaining.
04 -
Sprinkle the cooked and crumbled bacon evenly over the tater tots. Then spread both types of shredded cheese over the bacon layer for a rich flavor profile.
05 -
Slowly and carefully pour the egg mixture evenly over everything in the dish, moving slowly to ensure it gets between the tater tots and other ingredients.
06 -
If desired, sprinkle chopped green onions over the top. Bake uncovered for 40-45 minutes until the eggs are completely set and the top is golden brown and slightly crispy.
07 -
Remove from the oven and let the casserole rest for 5-10 minutes. This helps it set and makes cutting and serving easier.