In a large mixing bowl, whisk together chickpea flour, water, olive oil, salt, and optional sugar until completely smooth and lump-free. This should take about 2-3 minutes of whisking.

Cover the bowl with a clean kitchen towel or plastic wrap and let the batter rest at room temperature for at least 30 minutes.

While the batter rests, preheat your waffle iron to medium-high heat according to the manufacturer's instructions.

Once preheated, lightly brush both the top and bottom plates of the waffle iron with oil.

Pour the prepared batter into the preheated waffle iron, filling it according to the manufacturer's instructions. Close the lid and cook for about 4-6 minutes, or until the waffles are golden brown and crisp.

Carefully remove the waffles from the iron and serve them warm for the best texture.