Sprinkle yeast over warm milk; stir to dissolve. Beat egg yolks and add to yeast mixture with vanilla. Sift together flour, salt and sugar; add to liquid ingredients. Stir in melted butter and combine thoroughly. Beat the egg whites until stiff, carefully fold into batter. Let mixture stand in a warm place about 45 minutes (I put in microwave on keep warm cycle) until mixture doubles in bulk. Use 3/4 - 1 cup per waffle, makes 8-12 waffles. Top with cool whip and strawberries or fruit of your choice.

Serve with coffee, juice, milk or tea.