Beef Stroganoff with Egg Noodles

Ingredients

• 1 lb (450g) beef sirloin or tenderloin, thinly sliced
• 1 tbsp olive oil
• 2 tbsp unsalted butter
• 1 small onion, finely chopped
• 2 cloves garlic, minced
• 8 oz (225g) cremini or button mushrooms, sliced
• 1 tbsp all-purpose flour
• 1 cup (240ml) beef broth
• 1 tbsp Worcestershire sauce
• 1 tsp Dijon mustard
• 1/2 cup (120ml) heavy cream
• 1/2 cup (120ml) sour cream
• Salt
• black pepper
• 1 tbsp fresh parsley, chopped (for garnish)
• 12 oz (340g) egg noodles
• 1 tbsp unsalted butter
• 1/2 tsp salt (for boiling water)