A traditional British dish known as "beef olives" consists of filled, thinly sliced beef that is folded into a parcel and slowly cooked in a rich brown sauce.
To make the brown sauce, heat the butter until it starts to foam, then add the flour and stir for 1 min. Next, add the stock slowly while stirring, and bring to a boil for a minute.
To make the brown sauce, heat the butter until it starts to foam, then add the flour and stir for 1 min. Next, add the stock slowly while stirring, and bring to a boil for a minute.