Not worth driving great distances but definitely stop by if you're in the neighborhood. Taqueria Y Pupuseria La Chalupa; 3505 Clayton Rd; 925 682 8176. Mexican and Salvadorian food. Burritos, tacos, tortas, enchiladas. Good carnitas. Didn't try but sounded interesting: empanadas: $3.80(plantain filled with custard and deep fried); tamal Salvadoreno: $2.50 (tamale wrapped in banana leaf, filled w/ chicken or pork, capers, olives, potatoes, garbanzos); yucca frita con chicharron: $6.25. Prices VERY reasonable. Grocery store (w/ fresh meat counter)adjoins restaurant.