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Export 6 ingredients for grocery delivery
Step 1
Thinly slice the beef, then tenderise it with, for example, a rolling pin.
Step 2
Take the slices of tenderised beef and slice then into strips by cutting across the grain of the meat.
Step 3
Melt the butter in a pan, add the beef, season with salt and pepper and stir-fry for 5 minutes. Remove with a slotted spoon and put to one side.
Step 4
Add the onion into the pan and fry gently for 5-10 minutes until the onions start to go brown.
Step 5
Whisk the flour into the beef stock and add it into the pan with the onions. Mix well.
Step 6
Add back the beef, stir, then add in the sour cream.
Step 7
Bring to the boil, cover and cook on a very low heat for 15 minutes.
Step 8
Stir one more time before serving.