→ Beef
01 - 1.1 lb beef sirloin or tenderloin, thinly sliced
02 - 1/2 tsp salt
03 - 1/2 tsp freshly ground black pepper
→ Wild Mushrooms
04 - 9 oz mixed wild mushrooms (chanterelle, cremini, shiitake), cleaned and sliced
05 - 2 tbsp unsalted butter
→ Vegetables & Aromatics
06 - 1 medium yellow onion, finely chopped
07 - 2 cloves garlic, minced
→ Sauce
08 - 2 tbsp all-purpose flour
09 - 1/2 cup dry white wine
10 - 1 cup beef broth
11 - 1 tbsp Dijon mustard
12 - 3/4 cup plus 1 tbsp sour cream
13 - 1 tbsp Worcestershire sauce
→ Garnish
14 - 2 tbsp fresh parsley, chopped
15 - Optional: extra sour cream for serving