Tater Tot Breakfast Casserole

Spray a large 9x13-inch casserole dish with non-stick cooking spray, then line the bottom of the dish with your frozen tater tots in an even layer.
Heat the olive oil in a large skillet set over medium-high heat. Add the onion and ground sausage. Cook until the onions have softened and the sausage is fully cooked, about 8-10 minutes. Remove from heat and allow the sausage and onions to cool slightly before layering them over the tater tots.
Whisk together the eggs, heavy cream, milk, salt, black pepper, and cayenne pepper in a large bowl. Once thoroughly combined, stir in the shredded cheese.
Pour the egg mixture over the layered tater tots and cooked sausage, then cover with foil and transfer to the refrigerator. Allow the casserole to sit in the refrigerator for at least 45 minutes or up to 12 hours.
Preheat the oven to 350 degrees F when ready to bake. Tent the casserole dish with foil (so that the foil is not touching the cheese) and bake for 40-45 minutes or until the edges start to bubble. Remove the foil and continue to bake until the cheese is melted and bubbly, about 10 minutes. Remove from the oven, serve, and enjoy!