Cut potatoes crosswise in half; place in microwave-safe dish with 1 cup water. Cover and microwave on high 10-14 minutes or until almost tender, re-arranging once.
Immediately rinse under cold running water; drain well.
Meanwhile, combine cumin and salt and pepper; press evenly onto beefsteak. Place steak on grill over medium, ash-covered coals. Grill, uncovered, 16-18 minutes for medium rare doneness, turning occasionally. Remove; let stand 5 minutes.
About 5 minutes before steak is done, brush potatoes with some of the vinaigrette. Place on grid around steak. Grill 5-7 minutes or until golden brown, turning occasionally.
Carve steak into thin slices. Combine beef, potatoes, beans, cilantro and remaining vinaigrette in large bowl; toss gently. Serve immediately.
All materials courtesy of Family Features. Find more health information, as well as recipes and purchasing tips, at www.EatWisconsinPotatoes.com