In a bowl, mix fish with salt, ginger, garlic, and lemon juice. Set aside for 10–15 minutes.
In another bowl, whisk together gram flour, rice flour, green chilies, fresh coriander, and all seasonings.
Add a little water to form a thick batter. Keep it medium-thick, not runny.
Add the batter to the marinated fish and mix well, adjusting water only if needed.
Heat oil to 175–180°C (350–360°F).
Fry fish on medium heat until cooked through, about 2–3 minutes.
Increase heat briefly to crisp the pakoras until golden brown.
Remove and drain on a wire rack.
Sprinkle chaat masala and serve hot with lemon wedges and chutney.