A hidden culinary sanctuary, El Passadís del Pep may be located in one of the most visited quarters of Barcelona, but it’s out of sight of anyone who isn’t looking for it. Once you go down the long corridor that leads to the restaurant, you don’t need to do anything, and that includes choosing what to eat. From the moment you sit down, the “house” offers you your first bottle of cava, and the celebration of food and life begins. There is no menu and there are no “daily specials,” just whatever Joan Manubens and his team decide to cook that day. The restaurant, whose name means “Pep’s Corridor,” specializes in cocina de mercado, or market cuisine, prepared in a simple, traditional Mediterranean style. As if in a ballet, the show begins when the waiters start to dance around you and the food arrives at the table in a continuous flow of abundance: Iberian cured ham, anchovies, typical Catalan bread rubbed with tomato; sautéed baby squid with rice and garlic; choice shellfish such as cañaíllas (a kind of sea snail) prepared in such a delicate way that all the natural flavor is retained; velvet crabs or spider crabs cooked without any ingredient that could detract from their natural essence.

After four years of publishing weekly dispatches from Istanbul’s culinary backstreets (on IstanbulEats.com and now on this site as well), we are still regularly surprised by new discoveries, impressed by the staying power of old standards and shocked by how quickly so much can change. For better or for worse, it is that dynamism that Istanbulites line up for, and the city never seems to run short on it. Heading into 2013, we are licking our chops in anticipation of the expected and the unexpected, which are always sure to be delicious, or at least interesting. Here are our Best Bites of 2012.

Editor’s note: This is the penultimate installment of “Best Bites of 2012,” a roundup of our top culinary experiences over the last year. Stay tuned for our final “Best Bites” dispatch, from Istanbul, tomorrow. Restaurant Roma We hadn’t planned on bringing in La Nochevieja at Restaurant Roma, but it was nearby and we didn’t feel up for public-transport adventures on New Year’s Eve. Situated on a quiet street in the upscale but untouristy Barcelona neighborhood of Sant Gervasi, Roma is thoroughly nondescript – a neighborhood joint frequented by neighborhood people of a certain age. The wood-paneled walls, racks of Maxim magazines and TV mounted in the corner kept our expectations pretty low.

The past year has been a very good one for food in Mexico City. We’ve had a wonderful time exploring new restaurants, tracking down exciting dishes and meeting great people along the way. There have been so many memorable moments over the past year that it was hard to sit down and come up with a list of the ones that really stood out the most. Through debate and discussion (and some revisits), we narrowed down the worthy field to our top favorites. Here are our Best Bites of 2012 from Mexico City. El Pozole de Moctezuma First up on our best food experiences of the year would have to be the pozole at El Pozole de Moctezuma. Located near Metro Garibaldi, the building is nondescript and shows no sign of the deliciousness that lies within, so if we hadn’t been taken there by a friend, we never would have known about it. But what a discovery! The friendly staff showed us exactly how to build the perfect bowl of pozole, from choosing the color and flavor of the broth to adding oregano, chili powder, lime juice and, of course, a splash of mezcal. A bowl of soup never tasted so good or filled us up more satisfyingly than that at El Pozole de Moctezuma. Best of all, the place is a long-term neighborhood fixture that celebrated its 65th anniversary in 2012, a fact that bodes well for future visits.

Editor’s note: This is the second installment of “Best Bites of 2012,” a roundup of our top culinary experiences over the last year. Up next is Mexico City. Oinoscent Greek wine has always been a bit of a hidden gem, excellent but produced in small quantities and thus more expensive when exported; as a result, it still has not gotten the international attention it deserves. Hopefully, the crop of wine bars that have recently sprung up in downtown Athens will help more people get to know Greek wines.

Editor’s note: This post is the first installment of “Best Bites of 2012,” a roundup of our top culinary experiences over the last year. Stay tuned throughout this week for “Best Bites” from all of the cities Culinary Backstreets covers. Hai Di Lao Hot Pot Restaurant We’re usually loathe to mention a restaurant that has locations all around China, but we were blown away by the dedication to customer service here – something that is sorely lacking in China. Too often, it’s a choice between authentic flavors or service. Not at Hai Di Lao.

Mexico City is probably not the first place one thinks of when it comes to ice cream. Enchiladas and tacos, sure, but ice cream? In fact, the city has quite an established ice cream scene, with spots in nearly every neighborhood. La Especial de París, an ice cream parlor on the edge of Colonia San Rafael, stands out as a family-owned venue that – unlike many of its competitors, which have increasingly turned to selling mass-produced dairy products – still makes all its ice cream the old-fashioned way, by hand and with fresh, all-natural ingredients.

Dear Culinary Backstreets, I’ll be in Spain during the December holidays and I’m wondering if Barcelonans eat any special meal on Christmas? If so, what is it and where in the city could I try it?

If Lades, which means “wishbone” in Turkish, provided an actual wishbone alongside the usual post-meal wet wipe and toothpick, we’d close our eyes and make a wish that we could eat their tandır, or oven-roasted baby lamb, seven days a week. These large knots of tender, fragrant meat lined with a soft cushion of fat are the sort of high-calorie lunch that we might save for a special occasion, but Lades regulars take for granted.

While Athens’ more upscale neighborhoods have recently rediscovered the gastronomic joys – and, let’s face it, the economic sense – of eating souvlaki, this classic dish has never gone out of fashion in Athens’ downtown. The city’s longtime souvlaki venues may have changed little in the last 50 years, but there is something particularly satisfying about their old-fashioned, no-frills approach. With their clientele of seasoned fanatics, the best of the bunch offer a lesson in what it truly means to eat like an Athenian. (Keep in mind that the menus at these old-school souvlaki places have remained virtually unchanged for decades, meaning that there is no chicken served, only the traditional pork or “kebab” – usually made with a mixture of minced veal, lamb and sometimes pork – in variations described in our Athenian souvlaki primer.)

We would have liked to like the profiterol at İnci Pastanesi, and to believe their claim that the profiterole was invented on the premises in the 1940s. But in fact, we’ve always appreciated İnci for non-culinary reasons. Until last week, this old-school Beyoğlu pastry shop had been spooning out cream puffs covered in chocolate goop for almost 70 years with respect for tradition and a refreshing contempt for the latest trends in interior design. Our eyes had grown used to resting on its charmingly worn façade as we walked down İstiklal Caddesi. For better or worse, İnci was an institution.

Dear Culinary Backstreets, What and where is safe to eat in Mexico City? We’ve heard horror stories from other travelers about “Montezuma’s Revenge” and would like to avoid getting sick while visiting the city.

In Mexico, sandwiches generally come in the form of the torta, usually made out of a white bread roll known as a bolillo that has been sliced in half and then filled to the brim with meat, avocado, tomato, onion and sliced jalapeño peppers. In Mexico City’s San Rafael neighborhood, however, a family-owned sandwich shop called La Vaca de Muchos Colores is doing its best to expand the city’s sandwich scene.

From a country that maintains a “national strategic pork reserve” – vast bunkers of frozen meat that can be released when the price of the commodity gets too high – one might not expect to find an impressive number of traditional vegetarian restaurants, but you’d be surprised. While exact numbers are hard to pin down in China, it is thought that around 20 percent of the Chinese consider themselves Buddhist, a number that tops out at around 280 million people. In culinary terms, that translates to hundreds of millions of would-be vegetarians – though, as in any religion, devotees interpret tenets at will, and most “vegetarians” in China enjoy a sprinkling of pork in their tofu to “add flavor.”

It is hard to identify exactly when the forgotten neck of Istanbul between Etiler and Arnavutköy became prime real estate. Not so long ago, overgrown green space alongside the road was interrupted by the occasional car wash and low-slung shanty; it was not so much a place as a road to other places. But now it seems this road is going places of its own. A private tennis club with a swimming pool shares a parking lot with Backyard, a café and restaurant with a big grassy yard filled with lounging parents and children wallowing in that rare Istanbul commodity: grass.