#1. In large bowl whisk together flour, baking powder, and salt.#2. In a separate bowl whisk together milk, butter, eggs, and yolk.#3. Pour the milk mixture into the flour and stir just until combined.#4. Fold in cheese, ham, and chives.#5. Heat waffle iron and spray or butter both sides.#6. Add batter carefully and cook until golden brown.#7. Serve immediately with maple syrup, if desired.