Belgian waffles

1. Pour the warm milk and warm water into the bowl of a stand mixer. Add the crumbled yeast. Attach the wire whisk to the stand mixer and mix on speed 2 until the yeast dissolves.
2. Add the egg yolks and mix again on speed 2 until smooth.
3. In another bowl, combine the flour and salt. Move the speed control lever to speed 2 and mix in the dry ingredients. Slowly fold them into the milk mixture.
4. Add the melted butter and mix for another minute. Move the speed control lever to speed 4 and mix for 4 minutes until smooth.
5. In another bowl, beat the egg whites on speed 8 until they form soft peaks.
6. Turn the speed control lever to speed 2 and begin adding the batter to the egg whites. Mix until fully incorporated.
7. Cover the dough with a cloth and let it rest in a warm place for 30 minutes.
8. Preheat the waffle iron to high. Using a ladle, pour 2 portions of batter onto the waffle iron and cook until golden brown. Repeat until all the batter is used. Serve immediately.