We're coming to SF from LA for the weekend and taking our adult sons to Teatro Zinzani on Sunday, which costs $110 a person and includes a 5 course meal. So we are looking for a restaurant with decent food for Saturday night that's not too expensive. The problem: because of a medical diet I'm on for a chronic condition, I need to eat simple food: grilled fish or chicken and plain vegetables, for example. So Indian and Mexican restaurants as much as I love them are out. Any suggestions?