Esposto's Borel Deli 59 Bovet Rd, San Mateo, CA94402 Esposto's is a family-owned deli and catering business with over fifty years serving San Mateo. It is best known for its…More tri-tip sandwiches, grilled outdoors rain or shine. All sandwiches are huge, and come with a side salad of choice. Gift baskets and other specialty items are also offered. The company also caters weddings and other events. The deli is in the Borel Square shopping center off El Camino just north of Highway 92. Look for the huge eucalyptus tree on the Bovet Road entrance. Esposto's has a second location on Crystal Springs Road, and its catering business is run from South San Francisco.