EL Sierreno is a food truck on the freeway side of embarcadero ave. not far from 5th Ave. the menu prices seem high but that’s not what i was charged. specials listed include tacos, aqua fresca @1.25 sampling: steak burrito(4.50) –chewy beef with white onions and rice in a small size burrito. came with 2 lids of salsa, some carrots, and chips. –burrito tasted dry, salsa took cake of that burrito below average 2.5 stars. frijoles refritos: –seldom see many people here. of course parking’s bad here too.