Ingredients:
1 lb beef sirloin or tenderloin, sliced thinly into strips
Salt and pepper, to taste
2 tbsp olive oil, divided
1 tbsp unsalted butter
1 medium onion, finely chopped
3 cloves garlic, minced
8 oz mushrooms, sliced (button or cremini work well)
1 tbsp all-purpose flour
1 cup beef broth
1 tbsp Worcestershire sauce
1 tsp Dijon mustard
1 cup sour cream
12 oz egg noodles
Fresh parsley, chopped (for garnish)
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