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).