Creamy Chicken Stroganoff

Name: Creamy Chicken Stroganoff
Ingredients: 8 ounces baby bella or cremini mushrooms; 2 large shallots (about 5 ounces total); 4 cloves garlic; 2 medium scallions; 1 1/4 pounds boneless, skinless chicken breasts (2 large breasts); 3/4 teaspoon kosher salt, diided; Freshly ground black pepper; 4 tablespoons olive oil, divided; 3 tablespoons all-purpose flour; 1/2 cup dry white wine; 3 cups low-sodium chicken broth; 1 tablespoon Dijon mustard; 1 teaspoon Worcestershire sauce; 1/4 cup sour cream; 1/2 teaspoon sweet paprika; 8 ounces dried wide egg noodles; 3 tablespoons unsalted butter