Chicken Thyme with Green Bean Couscous with Mashed Potatoes, Roasted Green Beans & Honey Dijon Dressing

Wash and dry produce.

Trim green beans if necessary; cut crosswise into 1-inch pieces. Peel and finely chop garlic. Finely dice tomato. Trim and thinly slice scallions, separating whites from greens. Zest and quarter lemon.