What can I do to add more flavor into my beef barley soup? This time around my beef barley soup is tasting a bit on the plain side. It has the right amount of saltiness but is lacking in the flavorful department. The ingredients used thus far have been:

Beef Stock, Water, Salt, Ground Black Pepper, Seasoned Pepper, Rosemary, Onions, Carrots, Barley, and Cubed Beef.

What can I do to help boost its flavor?
If you use self-made beef stock, try boiling a bit longer, so that the flavour of the beef is a bit more concentrated.
Boil your soup a bit longer.
Use more beef stock and/or cubed beef.
I don't know how much herbs you put in. Maybe a bit more pepper or rosemary can make a difference.