Turkish sumac roast chicken with flatbread

Name: Turkish sumac roast chicken with flatbread
Ingredients: 1 1/2 cups plain flour, extra for rolling dough; 1 tsp salt; 3/4 cup water, warmed; 1 1/2 tsp dry yeast; 1 tsp sugar; 1 large chicken, quartered; ground black pepper; 1/4 cup olive oil; 1/2 cup ground sumac; 1 tsp ground allspice; 1 tsp ground cinnamon; 2 large yellow onions, minced finely in a food processor; 1 tbsp honey; 1 small chilli, chopped finely; 1/2 cup chicken stock; 1 tbsp unsalted butter; 1 cup slivered or flaked almonds