Make sure to squeeze all the water from the zucchini to get a crispy outside. If all the water has been squeezed consistency of the batter should be nice and thick.
Add all the mix-ins at the end to prevent getting a runny batter.
If you feel like the batter is too runny add a tablespoon or two chickpea flour.
The chickpea flour can be replaced with the same amount of all-purpose flour.