These small-fruited peppers originated in Galicia, northwest Spain, where the bite-sized green fruit is sautéed in olive oil and served with coarse-ground sea salt in tapas bars across the country. Most of the peppers are relatively mild, but an occasional unpredictable hot one led a New York Times writer to call eating the dish a game of “Spanish Roulette!” Also fine for pickled peppers; the heat increases as they ripen to red. An authentic regional variety.