DCist is excited to welcome back our founding editor, Michael Grass, who comes to us this Sunday with a special Opinionist. One of the most frustrating things about living in Washington, D.C., for me is walking along Eye Street up and around the corner from the International Monetary Fund. Between 20th and 21st streets NW sits Kinkead’s, one of the city’s long-standing respected restaurants. Kinkead’s sits in the house where my late grandfather and my…