Beat bananas, milk substitute, oil, and sweetener with a wire whisk or electric mixer.
Stir in flour, baking powder and salt until just mixed. Batter may be lumpy.
Fold in nuts or berries or chocolate chips.
Spray waffle iron with non-stick cooking spray. Pour about 2/3 cup of batter onto the center of the iron. Close lid.
Bake about 5 minutes or until steaming stops. Carefully remove waffle and serve with non-hydrogenated margarine (I like Earth Balance Natural Buttery Spread) and real maple syrup or honey. Other serving suggestions: spread with peanut butter or top with fresh berries and vegan whipped cream or vegan ice cream.
If you have extra batter, either store it in an airtight container in the fridge for a day or two OR go ahead and cook up some more waffles and freeze them in Ziploc bags. Then toast for a weekday morning treat!