Add all the waffle ingredients to a blender or food processor and blend until smooth.
Fill the waffle moulds 3/4 full with the batter and cook until golden and crisp.
Repeat with the remaining batter, keeping the cooked waffles warm in the oven if you like.
Serve warm with a little jar of heavenly rhubarb yoghurt.
This recipe can also be used to make pancakes if you don’t have a waffle maker.