In a bowl, combine chopped potato, onion, green chilli, spinach, coriander leaves, nigella seeds, cumin, coriander seeds, fenugreek leaves, red chilli flakes, red chilli powder, chaat masala, turmeric, and salt. Mix well.

Add gram flour and mix until combined.

Gradually add water and mix until a thick batter forms.

Heat oil in a wok over medium-high heat. Add baking soda and mix well.

Using a spoon, carefully drop small portions of the batter into the hot oil.

Fry the pakoras until golden brown, turning occasionally.

Remove the pakoras from the oil and drain on paper towels.

Serve it hot with green chutney and enjoy!