1 Whole Chicken ( 3-4 lbs)1 ½ lbs potatoes ( yukon or reds), thinly slicedMarinade:2 Dried Ancho Chilies-re hydrated2 tsp smoked paprika6 cloves garlic1 tsp kosher salt1 tsp coriander¼ cup plus 1 T sherry vinegar or red wine vinegar¼ cup plus 1 T Olive Oil½ tsp pepperCoriander Sauce:1 cup plain yogurt1 bunch Coriander- finely chopped½ tsp kosher Salt½ tsp corianderCracked pepper1 tsp lemon juice1 tsp olive oil