Greg Baxtrom is the man behind Olmsted, a restaurant in the Brooklyn neighborhood of Prospect Heights. I stayed in the borough, though I went a few neighborhoods away, to Fort Greene, and to an artist who is deeply identified with the borough, Mos Def. When you pick a Mos Def song, you’re picking something that’s socially aware, brilliantly analytical, and also organized for maximum potency: sort of like good food. I sent Greg “Climb,” a beautiful and abstract song about ambition, aspiration, loneliness, and community.