These tacos hail from the coastal town of Ensenada, in Baja California, but were first cooked for us in the Napa Valley by our friends Barbie and Adam, who had just returned from a working visit to Mexico. I think you will agree they taste infinitely better than what passes for tacos in many parts of the world. This is a great dish to serve with family or friends as it demands an interactive approach at the table, with everyone getting involved and making t