Preheat the oven to 350°F. Prep a 9x13-inch baking pan with nonstick cooking spray. Set aside.
Heat a large skillet over medium. Add in the sausage and onion. Cook, breaking up the sausage with a spoon, until the sausage is cooked through and the onion is translucent. Add in the garlic and cook for another minute until fragrant. Drain off the excess grease and transfer the mixture in your prepared baking dish. Spread in an even layer.
1 pound spicy breakfast sausage, 1 onion, 2 cloves garlic
In a medium bowl, whisk the eggs, milk, salt and pepper until combined.
8 large eggs, 1 cup milk, ½ teaspoon ground black pepper, ¼ teaspoon kosher salt
Sprinkle 1 cup of the cheddar cheese over the sausage mixture.
2 cups freshly shredded cheddar cheese
Pour the egg mixture evenly over the sausage and cheese in the pan.
Top the casserole with the tater tots and the remaining cup of cheese. At this point, you can wrap the casserole and store it in the fridge for up to 12 hours or bake it right away.
16 ounces frozen tater tots
Bake uncovered for 50-60 minutes or until the egg mixture is set in the center. Garnish with chives and enjoy.
Chopped fresh chives