Marinated Flank Steak with Lemony Arugula and Feta Salad from 'Kitchen Garden Cookbook'

Jeanne Kelley's marinated and grilled flank steak with arugula salad comes from the "Spring" chapter in her new Kitchen Garden Cookbook. But with its clean flavors and almost effortless preparation, the dish lands squarely in the realm of summer cooking. Besides, arugula grows year-round in many …