Lomo Saltado: The Peruvian Stir-Fry That Explains Everything About Peruvian Food

Lomo saltado is a Peruvian stir-fry of tender beef sirloin, tomatoes, and red onion, seared fast in a screaming-hot wok with soy sauce and ají amarillo, then piled over white rice with a tangle of golden fries tucked into the same plate. That's the short answer. The longer answer is that lomo saltado is arguably the single best dish for understanding Peruvian food, because it isn't "Peruvian" in the way people expect. It's Peruvian and Chinese at the same time, cooked with a French-style knife cut, plated with an American side of fries, and held together by a native Peruvian pepper that does more work in the dish than any other ingredient. If you want to understand how Peru eats, start here.

Why Lomo Saltado Is the Perfect Lens on Peruvian Food Culture

Most people assume a country's national dish will be its "purest" one — the oldest, most isolated, least influenced by outsiders. Peru breaks that assumption. Lomo saltado is proof that Peruvian cuisine has always been a cuisine of fusion, built by waves of immigration layered on top of Indigenous ingredients and techniques. It is stir-fried in a wok, seasoned with soy sauce, and finished with a pepper that has grown in Peru for thousands of years. Nothing about that combination is a contradiction in Peru — it's just Tuesday dinner.

This is the dish Peruvians point to when they explain their food to outsiders, because it does the explaining for them. One bite carries Chinese technique, Peruvian ingredients, and a plating instinct (rice AND fries, no need to choose) that is distinctly, unapologetically Peruvian. Understanding lomo saltado means understanding that Peruvian food was never one thing — it was always several things, cooked together.

It's also a good entry point into a bigger story: Peruvian food is one of the fastest-growing food trends in the U.S. right now. For the full picture, see why Peruvian food is having a moment in the United States.

Chifa: Peru's Chinese-Peruvian Fusion, Explained

The word for this fusion cuisine is Chifa, and it has a specific historical root. Starting in the mid-19th century, tens of thousands of Chinese laborers — most from Guangdong province — arrived in Peru, many under indentured labor contracts to work Peru's coastal plantations and, later, to build railroads. When those contracts ended, many stayed, and a significant number settled in Lima, opening small restaurants that served the food they knew how to cook, adapted to the ingredients Peru actually had on hand.

Over the following decades, into the early 20th century, those restaurants — and the home kitchens connected to them — did something that happens whenever two culinary traditions share a kitchen for long enough: they stopped being purely one or the other. Chinese stir-fry technique met Peruvian potatoes, corn, and ají peppers. Soy sauce, ginger, and scallions became pantry staples alongside cumin and garlic. The result, Chifa, is now its own recognized culinary tradition in Peru, with dedicated Chifa restaurants in nearly every neighborhood of Lima and beyond. Lomo saltado is Chifa's most famous export — the dish that graduated from Chinese-Peruvian restaurants into the category of Peru's national comfort food.

The Ingredients That Make Lomo Saltado What It Is

A proper lomo saltado is built from a short, deliberate ingredient list, and every item earns its place:

• Beef sirloin — cut into strips, not cubes, so it sears fast and stays tender in the short time it spends over high heat.
• Tomatoes — wedges, not dice, added late so they soften without turning to sauce.
• Red onion — sliced into thick strips, cooked just until it starts to go translucent at the edges but keeps some bite.
• Soy sauce — the clearest fingerprint of Chifa technique, providing salt and umami depth in one move.
• Ají amarillo — Peru's signature yellow pepper, adding fruity heat and color.
• Cilantro — chopped, added at the very end for brightness.
• Rice and fries — both, always, served alongside rather than making you choose.

Some home cooks add a splash of red wine vinegar or a spoonful of oyster sauce, and there are regional and family variations on exactly how much soy versus ají goes into the pan. But the core seven ingredients above are non-negotiable across nearly every version you'll find in Peru.

The Role of Ají Amarillo: The Flavor Bridge

If soy sauce is the dish's savory backbone, ají amarillo is what keeps lomo saltado from tasting like a generic beef stir-fry. Ají amarillo is fruity before it's hot — closer in flavor profile to a ripe mango or apricot with heat layered on top than to a straightforward chili burn. That fruitiness is exactly what the dish needs, because it bridges two flavor worlds that don't naturally meet: the deep, salty umami of soy sauce and the fresh acidity of tomatoes and onion.

Without ají amarillo, lomo saltado tastes like two separate dishes fighting on one plate — an Asian stir-fry sauce sitting on top of a Latin American vegetable base. With it, the two halves resolve into one flavor. The pepper's natural sweetness rounds out the soy sauce's saltiness, while its heat gives the tomatoes and onion something to push against. It's the ingredient doing the most invisible work in the entire dish.

Why This Combination Works: High Heat, Fruity Pepper, Soy Sauce

There's a reason lomo saltado tastes more complex than its short ingredient list suggests, and it comes down to technique as much as ingredients. Cooking over very high heat — traditionally in a wok, though a well-heated cast iron or carbon steel skillet gets close — triggers fast caramelization on the beef and vegetables. That caramelization creates savory, slightly charred notes (what's sometimes called "wok hei," or the breath of the wok) that a slow braise or a low-heat sauté simply can't produce.

Layer soy sauce's umami onto that caramelization, and you get depth. Layer ají amarillo's fruit-forward heat on top of that, and you get brightness that cuts through the richness instead of getting lost in it. The result is a dish where three separate flavor mechanisms — Maillard-driven char, fermented umami, and fresh chili fruitiness — hit at the same time instead of one at a time. That's the synergy that makes lomo saltado taste bigger than the sum of its parts, and it's why rushing the cook (low heat, overcrowded pan, sauce added too early) is the single most common way home cooks fall short of the restaurant version.

Lomo Saltado: The Full Recipe

Serves 4 | Active time: 25 minutes

Ingredients

• 1.5 lbs beef sirloin, sliced into ½-inch strips
• 2 tablespoons vegetable oil, divided
• 1 red onion, sliced into thick strips
• 2 large tomatoes, cut into wedges
• 2 tablespoons ají amarillo paste (or 2 fresh ají amarillo peppers, seeded and sliced)
• 3 tablespoons soy sauce
• 1 tablespoon red wine vinegar
• 2 cloves garlic, minced
• ¼ cup chopped cilantro
• Salt and black pepper, to taste
• 4 cups cooked white rice, for serving
• 3 cups french fries (fresh-cut or frozen, cooked crisp), for serving

Instructions

• Pat the beef strips dry and season generously with salt and pepper. A dry surface is what allows a real sear instead of a steam.
• Heat 1 tablespoon of oil in a wok or wide skillet over the highest heat your stove allows until it's just short of smoking.
• Add the beef in a single layer, working in batches if needed to avoid crowding the pan. Sear for 60–90 seconds per side, until browned but still pink in the center. Remove and set aside.
• Add the remaining oil to the pan, then the garlic and onion. Stir-fry for about 1 minute, just until the onion starts to soften at the edges.
• Add the ají amarillo paste and cook for 30 seconds, stirring constantly, until fragrant.
• Return the beef to the pan. Add the tomatoes, soy sauce, and vinegar, and toss everything together over high heat for 1–2 minutes, just until the tomatoes soften slightly but still hold their shape.
• Remove from heat, stir in the cilantro, and taste for salt.
• Plate immediately over white rice, with the fries either mixed into the stir-fry at the last second or served alongside so they stay crisp.

The Easy Weeknight Version

Traditional lomo saltado leans on ají amarillo paste, which isn't always sitting in every U.S. pantry. The fastest fix is swapping the paste for Aji Pepper Sauce Amarillo directly — it's built from the same ripe ají amarillo, already balanced for heat and acidity, so there's no separate paste to make or track down.

For a weeknight version: skip the paste step entirely and stir 2–3 tablespoons of Aji Pepper Sauce Amarillo in with the soy sauce and vinegar at the same point in the recipe above. It dissolves straight into the pan sauce and delivers the same fruity-heat bridge between the soy and the vegetables, in a fraction of the prep time. It's the same shortcut that makes ají amarillo grilled chicken thighs and ají amarillo chicken skewers fast enough for a Tuesday, and it works the same way here.

If you want to go deeper on the pepper itself — where it comes from, how it's grown, and why nothing else quite replaces it — the complete guide to ají amarillo covers that in full.

Frequently Asked Questions

Is lomo saltado spicy?

Lomo saltado carries mild to moderate heat. Ají amarillo sits in the 30,000–50,000 Scoville range — hotter than a jalapeño but well below a habanero — and traditional recipes use it more for fruity flavor than raw heat, so the finished dish is approachable for most palates rather than aggressively spicy.

What cut of beef works best?

Sirloin is the standard choice because it's tender enough for a fast sear but has enough structure to hold up to high heat without turning tough. Tenderloin works too but is unnecessarily expensive for this dish; skirt or flank steak, sliced thin against the grain, is a reasonable substitute if sirloin isn't available.

Can I make lomo saltado without a wok?

Yes. A wide, heavy skillet — cast iron or carbon steel — will get you most of the way there, as long as it's preheated until very hot and you avoid overcrowding it. The goal is a hard sear, not a slow simmer, regardless of which pan you use.

Why does lomo saltado come with both rice and fries?

It's a distinctly Peruvian instinct to serve two starches rather than choose one, and it reflects how central the potato is to Peruvian cuisine — Peru is the potato's origin point, with thousands of native varieties. Rice, introduced through the same waves of immigration that brought Chifa cooking, sits alongside the potato rather than replacing it.

What's the difference between ají amarillo paste and Aji Pepper Sauce Amarillo?

Ají amarillo paste is typically just the pepper, cooked down and blended, meant to be seasoned further in the dish it's added to. Aji Pepper Sauce Amarillo is a finished, balanced sauce — ready to use directly as a substitute for the paste-plus-seasoning step, which is what makes it useful for faster versions of traditional recipes like this one.

Is lomo saltado the same as Chinese beef and tomato stir-fry?

They're related but not identical. Chinese beef and tomato stir-fry is one of the dishes Chinese immigrant cooks brought to Peru, and it's a direct ancestor of lomo saltado. What makes lomo saltado its own dish is the addition of ají amarillo and the Peruvian instinct to serve it with both rice and fries — the adaptations that happened once the dish took root in Peruvian kitchens.

Find Aji Pepper Sauce Amarillo and the full lineup at ajipeppersauce.com, or shop the Aji Pepper Sauce Amazon Storefront.