Ingredients
1 1/2 pounds rib-eye steak, trimmed of excess fat
1/4 cup soy sauce
1 tablespoon hot chili sesame oil
2 tablespoons dark-brown sugar
6 garlic cloves, minced
1 tablespoon finely grated fresh peeled ginger
2 medium red onions, halved and cut lengthwise into 1-inch wedges
1 green bell pepper, seeds and ribs removed, sliced into 1/2-inch strips
4 teaspoons vegetable oil
1 small head Boston lettuce, separated into leaves
Preparation
Freeze beef 20 minutes; transfer to a clean work surface. Slice diagonally (across the grain) into 1/8-inch-thick strips. In a small bowl, whisk together soy sauce, sesame oil, brown sugar, garlic, and ginger. Place onions and peppers in a small bowl; toss with half the soy marinade. Toss steak in remaining marinade; let stand 15 minutes.
Heat 2 teaspoons vegetable oil in a large nonstick skillet over medium-high heat. Add onions and peppers; cook until softened, about 5 minutes. Transfer to a plate. Wipe skillet clean with a paper towel.
Heat remaining 2 teaspoons vegetable oil over high heat. Cook half the meat, turning often, until browned, about 2 minutes. Transfer to a plate. Cook remaining meat. Return first batch and any accumulated juices to pan; add onion mixture. Cook, tossing, until heated through, about 1 minute. To serve, roll up beef mixture in lettuce leaves.
