At this unassuming Portuguese restaurant, there’s cod-and-jumbo-clam stew; deep-fried cod with onions and fried potatoes in garlic sauce; grilled cod with steamed potatoes, olive oil, and garlic sauce; cod covered in onions and mayonnaise with mashed potatoes; and a lot more. Of the 30 or so entrées on the regular menu, 15 are cod dishes […]