1 pound pkg. sage ground pork sausage
1 pound pkg. hot ground pork sausage
1 (30-oz.) pkg. frozen shredded hash browns
2 teaspoons kosher salt, divided
1 teaspoon black pepper, divided
6 ounces sharp Cheddar cheese, shredded (about 1 1/2 cups), divided
6 large eggs, lightly beaten
1 cup whole milk
1 tablespoon chopped fresh flat-leaf parsley
Preheat oven to 350°F. Coat a 13- x 9-inch baking dish with cooking spray.
Cook both ground sausages, stirring often, until they are crumbled and browned, about 10 minutes. Remove from heat; drain well on paper towels.
Working in batches, cook the hash browns in a large nonstick skillet according to package directions; omit salt if called for on package. Sprinkle with 1 teaspoon of the salt and 1/2 teaspoon of the pepper.
Stir together the sausage, hash browns, and 1 cup of the cheese in a bowl. Spoon into a prepared baking dish.
Whisk together eggs, milk, and remaining salt and pepper in a medium bowl. Pour over the sausage mixture.
Sprinkle with the remaining cheese. Bake in preheated oven until set, about 30 minutes. Sprinkle with parsley and chives.