Throw frozen hash brown patties in the baking dish and 4 other ingredients to get a meal so delicious

Preheat your oven to 375°F (190°C). Lightly grease a 9×13-inch glass baking dish with cooking spray or butter.
Arrange the frozen hash brown patties in a single, even layer in the bottom of the baking dish. They can be snug, but try not to overlap so they crisp up nicely on the bottom.

Sprinkle 1 cup of the shredded cheddar cheese evenly over the frozen patties, followed by the diced ham, spreading both so every bite gets a bit of each.
In a medium bowl or large measuring pitcher, whisk together the eggs, milk, salt, and black pepper until the mixture is smooth and well combined. This creates a simple custard that will soak into the patties as they bake.

Slowly pour the egg and milk mixture evenly over the hash brown patties, ham, and cheese, making sure it reaches all corners of the dish. Gently tilt the dish if needed to distribute the liquid without disturbing the patties too much.
Sprinkle the remaining 1 cup of shredded cheddar evenly over the top of the casserole.

Place the baking dish on the center rack of the preheated oven and bake for 40–50 minutes, or until the casserole is puffed, the cheese is deeply melted and golden in spots, and a knife inserted in the center comes out mostly clean with no runny egg.
If the top is browning faster than you’d like before the center is set, loosely tent the dish with foil and continue baking until done.
Remove the casserole from the oven and let it rest for 10 minutes. This allows the custard to finish setting and makes it easier to cut clean squares.

Slice into 6–8 portions and serve warm, scooping down through the layers so each serving includes crisped hash brown patties, ham, and plenty of cheese.
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