Instead of teaching us about the full range of sushi fish and shellfish, as well as the varied tastes and textures of the cuisine, most sushi chefs in the U.S. have neglected the Japanese style of eating and force-fed us simplistic menus that feature the least environmentally friendly—and least healthful—items: at the high end, bluefin tuna; at the low end, fatty belly cuts from lesser tuna; along with fatty industrial salmon, and factory-farmed shrimp and eel saturated in sugar. Until the latter half of the 20th century, none of these was considered suitable fare by connoisseurs of traditional sushi; none adheres to the Japanese practice of highlighting local, seasonal ingredients.

So imagine my delight when I walked into a sushi bar one evening and found not only a welcoming neighborhood atmosphere, but a chef who explained that he doesn’t serve bluefin tuna, because he doesn’t want it to go extinct. And imagine my surprise that this restaurant was in western Massachusetts, and that the chef was a rambunctious American whose ancestors had come not from Asia but from Europe.

At Fin Sushi in Lenox, Nick Macioge jokes with his diners and encourages them to get to know each other. Like a sushi bar in Japan, Fin is small and dominated by the counter. It’s not just the atmosphere. Macioge also tries to serve a more authentic meal. Instead of suggesting tuna, for example, he’ll talk his customers into sampling one of the most traditional sushi fish there is—saba, a mackerel that Macioge lightly marinates in salt and vinegar to bring the fish to the peak of flavor.

Macioge admits that it’s hard to persuade Americans to try the more traditional fish and shellfish, even though they’re more flavorful and generally less fatty. (These sea creatures also live lower on the food chain, they’re smaller, and they reproduce more quickly, which means they tend to contain less mercury and the catch is more sustainable.) But his approach has earned the food at Fin Sushi an exceptionally high Zagat rating—27 out of 30.

Macioge is one of a growing number of successful non-Asian sushi chefs. In 2005, Food & Wine magazine chose as one of its Best New Chefs a Caucasian sushi chef in Texas named Tyson Cole. A few months later, a San Diego chef named Jerry Warner was picked as California’s Sushi Master. Two years ago, one of the most high-profile Japanese restaurants in America, Morimoto, in New York City—operated by Masaharu Morimoto, an “Iron Chef” of Food Network fame—chose as its head sushi chef a young Caucasian named Robby Cook. And this year, one of the most talked-about sushi bars in San Francisco has been Sebo, run by chefs Daniel Dunham and Michael Black. (Black is half-Japanese and spent the first seven years of his life in Japan.) These chefs offer sushi fish so traditional that most Americans have never heard of them—which is why Dunham and Black chat across the fish case with customers about what they’re serving, just like the chefs I remember in Japan.