You will need a large roasting tin, so the liquid can evaporate and the potatoes ... until the chicken is cooked through. The chicken is cooked through when the juices run clear with no trace ...
That's exactly why I love a good one-dish dinner. My parents first introduced me to the recipe for Lemon-Rosemary-Garlic Chicken and Potatoes a few years ago and it's since become a family favorite.