Lunch in Laguna & Dana Point
Taco Loco (it's not much more than a stand) is great.
Beachcomber just up from Laguna (food is ok but setting can't be beat - it's on the beach. Beware though, waits on weekends are brutal).
Montage (reviews are mixed, but I've eaten there dozens of times and every meal has been excellent. Verrrrry pricey though).
Watermarc (not sure if they're open for lunch)
Break of Dawn