Steak Sandwiches with Quick-Pickled Vegetables

Directions

1. In a large bowl, whisk white vinegar and sugar until sugar is dissolved. Add carrots and radish. Refrigerate at least 2 hours. Meanwhile, in a shallow dish, combine brown sugar, rice vinegar and soy sauce. Add beef and turn to coat. Refrigerate 1 hour, turning once. Drain beef, discarding marinade.
2. In a large cast-iron or other heavy skillet, heat oil over medium-high heat. Cook steak until meat reaches desired doneness (for medium-rare, a thermometer should read 135°; medium, 140°; medium-well, 145°), 7-10 minutes on each side. Let rest 10 minutes before slicing.
3. Meanwhile, place baguette on an ungreased baking sheet, cut sides up. Broil 3-4 in. from heat until golden brown, 3-4 minutes. Drain carrots and radish, reserving 1-1/2 teaspoons vinegar marinade. In a small bowl, combine the mayonnaise, chili sauce and reserved vinegar marinade; spread half over cut sides of baguette. Top with steak, cucumber, pickled vegetables and cilantro; replace top. Cut crosswise into 6 slices. Serve with remaining mayonnaise mixture.