Juicy Beef Mushroom (Print Version)

# Ingredients:

01 - Scotch fillet steak or ribeye, 600g.
02 - 2 tablespoons vegetable oil, split in half.
03 - A big onion, cut into slices.
04 - 300g mushrooms, thinly sliced.
05 - 40g of butter.
06 - 2 tablespoons plain flour.
07 - Around 2 cups of beef stock.
08 - 1 tablespoon Dijon mustard.
09 - 150ml sour cream.
10 - Seasoning: salt and pepper, to taste.
11 - 250-300g of pasta or egg noodles.
12 - Chopped chives for decoration (if you'd like).

# Instructions:

01 - Pound steaks until 3/4 cm thick, then cut into 5mm wide strips.
02 - Sprinkle salt and pepper over the meat.
03 - Heat some of the oil over high heat in a big skillet. Cook half the beef for 30 seconds per side, place on a plate. Do the same with the rest of the oil and beef.
04 - Set heat to medium-high and melt the butter. Toss in the onions for 1 minute, then add mushrooms until they have a golden look.
05 - Mix in flour, stirring for a minute. Slowly add beef stock while stirring constantly.
06 - Stir sour cream and mustard into the sauce. Let it cook for 3-5 minutes, or until thick and creamy.
07 - Put cooked beef and plate juices into the skillet. Simmer briefly, around 1 minute.

# Notes:

01 - Choose high-quality beef for the best flavor.
02 - Pink beef after searing is fine.
03 - Avoid leaving the beef in the sauce too long.
04 - Cornstarch works if avoiding gluten.
05 - Stores in the fridge for 3-4 days.
06 - Can freeze leftovers easily.
07 - Pairs well with any starchy side dish.
08 - Pork makes a good substitute.