Recipe: Cheesy Hash Brown Breakfast Casserole

Name: Cheesy Hash Brown Breakfast Casserole
Ingredients: Cooking spray or oil; 1 tablespoon olive oil; 1 pound uncooked breakfast sausage, casings removed; 1 medium onion, diced; 1 medium red bell pepper, cored, seeded, and diced; 3/4 teaspoon kosher salt, divided; 1 (20-ounce) bag frozen shredded potatoes (do not thaw); 10 large eggs; 1 cup sour cream; 1 cup whole or 2% milk; 2 tablespoons Dijon mustard; 1 1/2 cups shredded sharp cheddar cheese (about 6 ounces); 1/4 teaspoon freshly ground black pepper