Homemade pastry with potatoes and spinach (in Turkish puaça) Ingredients: 2 cups all-purpose flour 1 cup wholewheat flour 1 cup soda (club soda in room temperature) 1 tsp salt 2 tsp baking powder 3 tbsp olive oil 1 egg Filling: 1 large potato (boiled, peeled, shredded) 1