Ingredients
Method
- Boil noodles in salted water until tender; drain and keep warm.
- Season beef with 1 teaspoon salt and pepper. Sear in 2 batches with 1 tablespoon oil over high, 90 seconds per side until at least 145°F; transfer to a plate.
- Add remaining oil; cook mushrooms and onion 7 minutes until browned. Add garlic for 30 seconds.
- Add flour; stir 1 minute. Whisk in broth, mustard, and remaining salt; simmer 4 minutes.
- Remove from direct heat; stir in sour cream and beef. Serve immediately over noodles.