Ingredients
1 pound sirloin steak, trimmed of visible fat1 tablespoon reduced-sodium soy sauce1/2 teaspoon freshly ground pepper2 scallions, cut into 1-inch piecesZest of 1 lime3 tablespoons lime juice1 1/2 tablespoons fish sauce1/2 teaspoon sugar1/4 teaspoon crushed red pepper4 cups torn frisée, or curly endive2 cups torn red leaf lettuce2 tablespoons chopped fresh mint2 tablespoons untoasted sesame oil, or canola oil