Harissa Chicken with Leeks, Potatoes and Yogurt

This recipe, from New York Times columnist Melissa Clark's new cookbook, Dinner: Changing the Game (Clarkson Potter), elevates the chicken-and-potatoes standby with spicy harissa (a North African condiment that you can find in many supermarkets these days) and a drizzle of cool yogurt. "One of my all-time favorites, this sheet-pan supper has it all," says Clark.…