Sausage Hash Casserole

Ingredients

• 1 (1-pound) package ground pork sausage with sage
• 1 (1-pound) package hot ground pork sausage
• 1 (30-ounce) package frozen shredded hash browns
• 2 teaspoons kosher salt, divided
• 1 teaspoon black pepper, divided
• 6 ounces sharp cheddar cheese, shredded, divided
• 6 large eggs, lightly beaten
• 1 cup whole milk
• 1 tablespoon fresh flat-leaf parsley, chopped