Combine 150 g chickpea flour, 5 g salt, 3 g chili powder, 5 g coriander powder, 3 g cumin powder, 2 g turmeric powder, 2 g ajwain, 1 g baking soda, 1 g asafoetida, and 3 g garam masala in a bowl.
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Gradually whisk in 150 g water and 15 g ginger-garlic paste to form a smooth, thick batter.