Casa de Bandini Best Mexican Restaurant & Cantina Carlsbad San Diego California, Diane Powers has brought the fun and flair of the original Casa de Bandini to The Forum Shopping Center in Carlsbad, Calif. Formerly located in Old Town, San Diego, this second generation Casa de Bandini Mexican Restaurant is the essence of Mexican culture: authentic Mexican food, fabulous mariachi entertainment, hot-off-the-grill homemade tortillas, giant margaritas and an environment depicting Colonial Mexico.