Picanha has long been prized in Brazilian steakhouses, but its global popularity is fairly recent. Never heard of it? For those playing culinary catch-up, here's a picanha primer.

Garlic-marinated cubes of beef tenderloin are deeply browned, tossed with onions and scallions and then glazed in a blend of vinegar, sugar and soy and fish sauces by constantly shaking the wok or ...