To make the fritters, simply combine the fennel, brown onion, fennel seeds, spring onions in a large bowl and mix to combine.
Add the flour and season to taste.
Pour in enough sparkling water to make a thick, porridge-like consistency.
Heat enough oil in a medium saucepan to come up around 5 cm in depth to 175 C.
Drop tablespoon amounts of the batter into the hot oil, using a second spoon to help drop them into the oil.
Cook in batches for 2-3 minutes, turning half way, or until golden and cooked through.
Drain on paper towel or a wire rack and season with salt.
For the yoghurt, simply mix the ingredients together in a medium bowl and season to taste.
Serve immediately.
