Recipe: One-Pot Weeknight Beef Stroganoff

Name: Recipe: One-Pot Weeknight Beef Stroganoff
Cuisine: European
Ingredients: 3 tablespoons unsalted butter, divided; 8 ounces cremini mushrooms, stems trimmed and sliced 1/4 inch thick; 1 medium yellow onion, small dice; 2 medium garlic cloves, finely chopped; 1 pound lean ground beef; 3/4 teaspoon kosher salt, plus more for seasoning; 1/4 teaspoon freshly ground black pepper, plus more for seasoning; 3 tablespoons all-purpose flour; 1 1/4 teaspoons paprika; 4 cups (1 quart) low-sodium beef broth; 1 tablespoon Dijon mustard; 8 ounces dried egg noodles; 3/4 cup whole milk Greek yogurt; 1 tablespoon coarsely chopped fresh Italian parsley leaves (optional)