1 lb (450 g) beef sirloin or tenderloin, thinly sliced
8 oz (225 g) mushrooms, sliced
2 Tbsp unsalted butter
1 Tbsp olive oil
1 small onion, finely chopped
2 cloves garlic, minced
1 Tbsp all-purpose flour
1 cup beef broth
1 cup sour cream
1 Tbsp Dijon mustard
1 tsp Worcestershire sauce
Salt and black pepper, to taste
8 oz (225 g) wide egg noodles
Optional: chopped fresh parsley for garnish
Instructions
Cook egg noodles according to package directions until al dente. Drain and set aside.
Season beef strips with salt and pepper. In a large skillet, heat 1 Tbsp butter and oil over medium-high heat. Sear beef in batches for 1–2 minutes per side until browned but not fully cooked. Remove beef and set aside.