Basque Country Salt-Crusted Rib Steaks

How far would you go for a great steak? Would you drive the back roads of Spain’s Basque Country, an hour from San Sebastián, to wind up at a restaurant so well hidden, you have to grab a passerby by the arm and ask him to show you the door? Would you dine in a dungeonlike dining room that’s actually an old garage filled with bric-a-brac that seems to go back a half century? Would you patronize a restaurant that has no menu and only one main dish to speak of—and that dish is steak grilled w