Hand-stretched artisan flatbread baked against the searing clay walls of the tandoor, brushed with golden butter and fresh herbs.
Blend the mint leaves, coriander leaves, green chilies, and tamarind pulp with 2 cups water until smooth.
Strain the mix into a bowl, stir in the black salt, roasted cumin powder, and salt to taste, and chill the pani.
Mash the boiled potato with a little salt.
Crack a hole in the top of each puri, stuff in some potato and a few boondi, then fill with the chilled pani.
Serve at once so the puris stay crisp.