Easy 30-Minute Beef Stroganoff

Ingredients

• 1 stick unsalted butter, divided
• 2 pounds beef tenderloin, halved lengthwise and cut into ½-inch strips
• Kosher salt and freshly ground black pepper
• 3 shallots, minced
• 2 garlic cloves, minced
• 1 quart button mushrooms, sliced
• 1½ cups beef broth (store-bought or homemade)
• 1½ tablespoons Dijon mustard
• ½ cup sour cream
• ¼ cup fresh chopped fresh parsley
• 1 pound pappardelle
• ¼ cup chopped fresh dill