Chef John's Classic Beef Stroganoff Recipe

Ingredients

• 1 pound beef sirloin, thinly sliced
• 2 tablespoons olive oil
• 1 onion, thinly sliced
• 8 ounces cremini mushrooms, sliced
• 2 cloves garlic, minced
• 1 cup beef broth
• 1 tablespoon Worcestershire sauce
• 1 tablespoon Dijon mustard
• 1 cup sour cream
• Salt and pepper to taste
• 12 ounces egg noodles, cooked according to package instructions
• Fresh parsley, chopped for garnish