Step 1

Preheat the oven to 350°F. Butter a 13-by-9-inch baking dish and add the hash browns, spreading them into an even layer.

Step 2

In a large bowl, combine the shredded mozzarella, milk, half-and-half, pesto, eggs, green onions, and some salt and pepper. Pour the mixture over the hash browns and top with the cherry tomatoes and mozzarella pearls.

Step 3

Cover with foil, and bake for 30 minutes. Remove the foil, and continue baking until the center is set and edges are bubbly, 30 to 35 minutes.

Step 4

Let the casserole rest for a few minutes before cutting into squares. Sprinkle with the basil leaves, if using, and serve.