All-you-can-eat Mexican buffets are not easy to come across, but El Portal fills the void. While serving as a normal Mexican restaurant during the week, on Sundays El Portal offers a $12.99 all you can eat buffet featuring chorizos, nopales, and menudo. Even during the week the prices are reasonable, with typical meals costing $11 and consisting of rice, beans, guacamole, and carne. Details: http://castrovalley.patch.com/articles/new-mexican-restaurant-opens-tonight-on-lewelling#photo-13187669