Foryoueats: Lomo Saltado (Peruvian Stir-Fried Beef With Onion, Tomatoes, and French Fries) Recipe

Ingredients

• 1 pound (450g) beef tenderloin, skirt steak, or other tender and flavorful quick-cooking steak
• 1/4 cup (60ml) peanut, canola, or vegetable oil, divided, plus more if needed
• Kosher salt
• 1 medium (8-ounce/225g) red onion, cut into 1/2-inch slices
• 4 scallions (about 2 ounces/60g total), roots and any wilted parts trimmed, remainder cut into 2-inch lengths
• 1 fresh or frozen ají amarillo chili pepper (about 2 ounces/60g), defrosted if frozen, then stemmed, seeded, and sliced lengthwise into matchsticks (see note)
• 2 medium plum tomatoes (about 5 1/2 ounces/160g total), cored and cut into 3/4-inch-thick wedges
• 2 medium cloves garlic, minced
• 1-inch piece peeled fresh ginger (about 1/4 ounce; 7g), minced
• 1 tablespoon plus 1 teaspoon (20ml) soy sauce
• 1 tablespoon (15ml) apple cider vinegar
• 2 teaspoons minced fresh cilantro leaves and tender stems
• Freshly ground black pepper
• French fries , for serving
• Cooked long-grain rice, for serving