1 small cucumber, peeled, halved lengthwise and thinly sliced
1 cup red bell pepper, cut into strips
1/2 minced jalapeño pepper
1/4 cup coarsely chopped unsalted, dry-roasted peanuts
4 cups trimmed watercress or arugula
How to Make It
Combine the lime juice, fish sauce, sugar, and half the chopped fresh mint in a small bowl. Spoon 2 tablespoons of the dressing onto the flank steak; turn the steak over to coat both sides.
Broil steak 7 minutes per side, depending on thickness, until it achieves desired doneness. Let the steak stand 5 minutes; cut on a diagonal into very thin slices.
While steak cooks, toss remaining dressing with the carrot, onion, cucumber, red bell pepper, jalapeño, and remaining mint. Add the sliced steak and peanuts. Place 1 cup of the watercress on each of 4 plates. Top each plate with 1/4 steak mixture.