To dream of gravy represents pleasant feelings with something that is very easy. An area of your life that fulfills your needs perfectly or lets you enjoy having your way. Gravy may also reflect total confidence in enjoying yourself or indulging yourself.
Example: A woman dreamed of wanting gravy on her mashed potatoes and being unable to have it. In waking life she was a real estate agent and the housing market was tanking. The gravy she desired reflected the easiness of selling homes that went away as the housing market tanked.