salt something with something
1. Lit. to put a variety of salt or a salt substitute onto some food. Oscar salts his food with a salt substitute. Did you salt your meat with salt or something else?
2. Fig. to put something into something as a lure. (Refers to putting a bit of gold dust into a mine in order to deceive someone into buying the mine.) The land agent salted the bank of the stream with a little gold dust hoping for a land rush to start. Someone salted the mine to fool the prospectors.