Take a drive down to Manhattan Beach. Enjoy the pier and beach, but do not miss out on this fantastic restaurant. It's clean, inexpensive, friendly, with utterly delicious food. They have many tasty dishes suitable for vegetarians (but not vegans), as well as the standard Mexican fare very well prepared. I lived in L.A. for many years and ate there regularly.
1005 Manhattan Avenue, Manhattan Beach, CA
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And the wine store next to El Sombrero #2 is great, too.