Wash the zucchini and slice thin. Do not peel skin.
In a wide bowl, mix besan (chickpea flour), rice flour, red chili powder, turmeric powder, ajwain seeds, hing, salt, and cooking soda (optional).
Now add the water little by little and make a medium-thick batter of smooth consistency with hand or whisker.
Batter should not be too thick or thin. It should just coat the bajji slices correctly. Beat the batter further for a minute to make it fluffy or airy.
Heat oil in a wide, deep kadai/pan on medium-high flame.
Take 5-6 zucchini slices, add in the bajji batter, take each coated zucchini slice, and gently slide in the oil. Do not overcrowd.
Fry the bajji from both sides till they are crisp and golden in color. Once done, drain the bajji's on the paper napkin to absorb excess oil.
You can also sprinkle some chat masala powder over the fried zucchini bajji's. Serve crispy Indian Zucchini (Courgette) fritters recipe with tomato ketchup.