Recipe: Slow Cooker Hash Brown Casserole

Name: Recipe: Slow Cooker Hash Brown Casserole
Ingredients: Cooking spray; 4 large eggs; 1 cup whole milk; 8 ounces sour cream; 4 ounces cream cheese, at room temperature; 1 teaspoon kosher salt; 1/2 teaspoon freshly ground black pepper; 1/4 teaspoon ground mustard; 1 pound uncooked pork sausage, casings removed; 1 tablespoon unsalted butter; 1 small onion, diced; 1/2 medium red bell pepper, diced; 1 (30-ounce) package frozen shredded hash browns (do not thaw); 2 cups shredded sharp cheddar cheese (8 ounces), divided