1 (30-ounce) bag frozen hash browns
1 (1-pound) package sausage, browned and drained
1 cup shredded cheddar cheese
1 cup shredded mozzarella cheese
1/2 cup milk
1/2 teaspoons salt
1/4 teaspoon pepper
Spray a large slow cooker with non-stick spray or line with slow cooker bag. Put 1/2 each of the hash browns, sausage and cheeses; then repeat with the other half.
In a large bowl, whisk together the eggs, milk, salt and pepper. Drizzle over top of mixture in slow cooker.
Cook on high for 4 hours or low for 8 hours.