In the evening:

Mix with a wooden spoon in a large bowl:
1-1/2 cups water
1-1/2 cups flour
2-3 Tbsp sugar
1/2 package dry yeast

The batter will be a little lumpy. Leave covered overnight at room temperature.

In the morning:

Add to the flour mixture:
3 eggs
1-2 Tbsp oil
1/2 tsp vanilla

Heat waffle iron on high. Pour batter as directed and turn heat to medium. Cook until waffle is golden brown. Serve with butter and maple syrup or whipped cream and strawberries.