Sun-Dried Beef (Nua Daet Diew)

Ingredients

Equipment Needed

• •Heavy granite mortar and pestle (krok hin) for pounding the marinade paste
• •Wire cooling rack and sheet pan for drying
• •Fine mesh cover or cheesecloth for outdoor sun-drying
• •Wok or deep heavy pot for frying
• •Kitchen thermometer for oil temperature

Instructions

1. 1

   Pound the marinade paste

   In a granite mortar (krok hin), pound the garlic, cilantro roots, and white peppercorns into a rough paste. Not a powder. You want visible pieces of garlic and root still identifiable, but crushed enough that the cell walls are broken and the oils are released. The aroma should be sharp: garlic heat, the earthy green smell of cilantro root, the floral bite of white pepper. This is your kreung tam for the marinade. Three ingredients, but they govern the entire flavor of the finished beef.

   Cilantro roots (rak pak chi) are the foundation of Central Thai cooking. They taste nothing like the leaves. Earthy, concentrated, almost parsnip-like. If you can't find them, cilantro stems are a distant second. The roots are what you want.
2. 2

   Marinate the beef

   In a large bowl, combine the pounded paste with the fish sauce, oyster sauce, and palm sugar. Stir until the sugar dissolves. Add the beef strips and work the marinade into every piece with your hands. You want full contact. Every surface coated. The fish sauce starts pulling moisture from the beef immediately, so don't marinate for hours. Twenty minutes at room temperature is enough. The drying phase does the heavy lifting. Over-marinating makes the beef too salty because the osmotic exchange keeps going.

   Slice the beef against the grain. This is critical. Cutting against the grain shortens the muscle fibers, so the dried beef is chewy but not a jaw workout. With the grain, you get jerky that fights back.
3. 3

   Dry the beef

   Lay the marinated beef strips in a single layer on a wire rack set over a sheet pan. If you have strong afternoon sun and dry air, set the rack outside covered with a fine mesh to keep insects away. Four to six hours of direct sun at 30 degrees Celsius or higher. The strips should lose about half their moisture: darker in color, tacky to the touch, shrunken but still pliable. Not brittle. If you don't have reliable sun, use your oven at the lowest setting (around 70 degrees Celsius) with the door cracked open, for about 3 hours. A dehydrator at 65 degrees Celsius works too, about 3 to 4 hours. Flip the strips once halfway through regardless of method.

   The name literally means 'one sun' (daet diew). One afternoon of drying. Not two days, not overnight. Just enough to concentrate, not enough to turn it into jerky. The texture target is pliable and dense, not snapping-dry.
4. 4

   Deep-fry the dried beef

   Heat vegetable oil to 180 degrees Celsius in a wok or deep pot. You need at least 3 inches of oil. Test with a small piece: it should sizzle immediately and rise to the surface within seconds. Fry the dried beef strips in batches. Don't crowd the wok. Each batch takes 2 to 3 minutes. The strips will puff slightly, darken to a deep mahogany, and the surface will develop a crust that shatters when you bite in. The sugars in the marinade caramelize, creating a glaze. When the bubbling slows down, the moisture is gone from the surface. Pull them out. Drain on a wire rack, not paper towels. Paper towels trap steam and soften the crust.

   Fry in small batches. Four or five strips at a time. If you dump everything in at once, the oil temperature crashes and the beef stews instead of frying. You want violent heat that seals the surface instantly.
5. 5

   Toast sesame and serve

   Toast the sesame seeds in a dry pan over medium heat, shaking constantly, until they're golden and fragrant. Thirty seconds of inattention and they burn. Scatter them over the fried beef. Serve with jaew dipping sauce (nam jim jaew): toasted rice powder, fish sauce, lime juice, dried chili flakes, shallots. The jaew adds the sour and spicy pillars that the beef itself doesn't carry. Together, the four pillars are complete. Salty and sweet in the beef. Sour and spicy in the jaew. That's the system.

Chef Tips

• •The preservation science is straightforward. Fish sauce at 25% salinity creates osmotic pressure that pulls water out of the beef's muscle cells. As moisture leaves, proteins contract and flavor compounds concentrate. The sun accelerates this by evaporating surface moisture, creating a gradient that draws more water from the interior. By the time you fry, the beef has roughly half the moisture content of fresh meat. That's why the flavor is so intense. You're eating the same amount of flavor in half the volume of meat.
• •Palm sugar matters. Granulated white sugar dissolves too fast, browns unevenly, and tastes flat. Palm sugar (nam tan pip) has a complex, almost butterscotch flavor from the trace minerals and the traditional processing. When it caramelizes on the beef's surface during sun-drying and again during frying, it creates a lacquer-like glaze that shatters. White sugar gives you a candy coating. Palm sugar gives you depth.
• •Cilantro roots (rak pak chi) are the secret weapon of Central Thai marinades. Most people outside Thailand throw them away. In Bangkok, vendors use them in everything: soups, stir-fries, marinades, pastes. They have a concentrated, earthy flavor that the leaves can't match. If your Asian market sells cilantro with roots still attached, buy it. If not, cilantro stems are acceptable but weaker. The roots are what Ajarn would insist on.
• •Nua daet diew is gab klaem, a drinking snack. It's designed to be eaten with beer or whiskey, alongside a jaew dipping sauce that provides the sour and spicy notes the beef doesn't carry. Don't skip the jaew. Without it, you have two pillars: salty and sweet. With it, you have all four. Thai food is a system.

Advance Preparation

• •The dried beef, before frying, keeps in an airtight container in the refrigerator for up to a week, or frozen for a month. This is a make-ahead dish by nature. Dry a large batch when the sun cooperates, store it, and fry portions as needed.
• •The marinade paste (garlic, cilantro root, peppercorn) can be pounded up to a day ahead and refrigerated in a sealed container. The aromatics actually deepen overnight.
• •Once fried, nua daet diew stays crisp for about 2 hours at room temperature. After that, the residual moisture softens the crust. Re-fry briefly at high heat to restore the shatter.

Frequently Asked Questions

Nutrition Information

1 serving (about 70g)