It's easy to see why people might think Salisbury steak and a hamburger ... Some recipes use dry onion soup mix or a can of French onion soup, which can also be used as a base for the gravy.

Onion. Sweet yellow onion is used as the base of the gravy and it adds a wonderful aromatic quality. Mushrooms. Salisbury steak is often served with a mushroom gravy. I prefer cremini mushrooms ...

There are many delicious ways to use onion soup mix besides making soup, and it's worth experimenting with it as a dry rub ...