For Mexican, try Casa de Pico or Casa de Bandini in Old Town. Easily accessible right of I-5 or I-8 (I believe) plus the trolley stops right there too.
You might also try George's at the Cove in La Jolla for seafood... there are several other places on Prospect St. that might fit the bill as well.
[This message has been edited by jakeller (edited 08-11-2001).]