Sieve together the flour, cornflour and baking powder in a bowl. Dissolve the yeast in 3 tablespoons of lukewarm water. Add the yeast solution, sugar, melted butter, milk and salt to the flour mixture and whisk well to make a smooth batter. Keep aside for 8 to 10 minutes. Heat a waffle iron and brush it with butter. Pour 1/3 of the prepared batter in the waffle iron and spread evenly. Bake for 2 minutes or until the waffle is golden brown. Repeat for the remaining batter to make 2 more waffles. Serve hot with honey and melted butter.