Where should I eat in Lake Atitlan, and which local food or drink is worth trying?

Each shore eats differently. Panajachel, the gateway, carries the widest choice along Calle Santander: the Deli's garden tables have served breakfasts and salads to travelers for decades, Guajimbo's grills Uruguayan-style parrilla, and Café Loco — run by a Korean roaster and beloved of coffee obsessives — pours single-origin Guatemalan beans a short walk from the docks. For the lake's own cooking, though, cross the water. In Santiago Atitlán the dish to find is patín: tiny fish from the lake simmered whole in a tomato and chile sauce, scooped up with tortillas in the comedores around the market — a Tz'utujil preparation that predates the introduced sport fish and survives as the town's defining plate.

Around the rest of the shore, follow the village specialties. San Juan La Laguna pairs its weaving cooperatives with small cafés pouring coffee grown in the village's own high plots — the La Voz Que Clama en el Desierto cooperative has exported San Juan's organic coffee for decades, and its beans are what the lakeside espresso bars serve. Santa Cruz La Laguna, up its steep lane from the dock, hides one of the lake's best tables at Café Sabor Cruceño, a training café where local staff cook plates like pepián and grilled mojarra — the tilapia-style lake fish served whole with rice, salad and tortillas — and the hostel La Iguana Perdida next door runs famous family-style dinners. San Pedro's lane above the dock is the lake's international strip, where the useful local skill is breakfast: licuados of papaya, banana or mango blended with milk or water, and atol de elote, the hot sweet corn drink sold from market pots.

Time meals to the lake's clock. Lunch is the main meal in the villages and comedores close their kitchens by mid-afternoon; dinner in San Pedro and Panajachel runs later, while the small villages eat early. Market eating rewards the morning — Sololá's Tuesday and Friday market above Panajachel and Santiago's daily market both peak before noon, with chuchitos (small tamales in tomato sauce) and tostadas from the stalls.

The water behind the menu is protected ground, and its fish story is on the public record. CONAP administers the basin as the Reserva de Uso Múltiple de la Cuenca del Lago de Atitlán — 124,722 hectares, recategorized in 1997 under Decreto 64-97 after more than four decades as a national park declared in 1955 — and the reserve's own management plan measures the lake at roughly 130 square kilometers (50 square miles), 188 meters deep on average and 324 meters (1,063 feet) at its deepest. That plan also names the introduced lobina negra, the largemouth bass behind most of the big fillets on lakeside menus, as a principal cause of the disappearance of the pato poc, the Atitlán grebe found nowhere else. The small fish in a bowl of patín are the older lake.

Lunch in a Santiago comedor: a shallow bowl of patín arrives steaming, the little fish whole in their brick-red sauce, a stack of hot tortillas wrapped in a woven cloth, and the lake's volcanoes framed in the open doorway.

The lake's fish story is written on the menu: the big mojarra and bass on most plates descend from species introduced in the 1950s, while patín's tiny fish are the survivors of the original fishery. Ordering patín in Santiago is not just lunch — it is the pre-tourism taste of the lake, and it is found in the market comedores, not the lakeside restaurants with English menus.

• Patín at midday in Santiago — Cross in the morning, eat at a market comedor at noon, and be on a return lancha before the wind
• Coffee where it grows — Take your espresso in San Juan after the weaving cooperatives, and buy La Voz beans there
• One splurge on Santander — Book Guajimbo's or a Santander dinner in Panajachel for the trip's final night

Village kitchens keep village hours — after about 8 p.m. the small towns go quiet and hungry latecomers are down to whatever their hotel serves. Patín depends on the catch and sells out by early afternoon on busy days. Lake water quality near the busiest shores is a standing concern, so the standard rule applies: salads and ice are safest in established restaurants, and street stalls with fast turnover are a better bet than empty ones.

Anchor one lunch on patín in Santiago, one coffee on San Juan's main lane, and one dinner on Calle Santander — the lake's three shores on three plates.