Maggi is well known over here. Comes in small bottles and contains a dark liquid seasoning with a strong salt and celery taste.
Hence the popular name over here for a herb that you know as "lovage" = maggikruid in dutch, which means maggiherb, referring to the celerytaste of Maggi seasoning. Lovage has a very pronounced celery taste, although it's no family of celery as such.
Also, does anyone put a small tbsp of flour in the roasting drippings, let it fry a while, add some bouillon or stock, let thicken and like I already suggested, add a dash of dark soy to season and colour?
The flour makes the jus just a little thicker so it sticks to your beef. Delicious!