3
russet potatoes
2 tablespoons
vegetable oil, plus more for deep-frying
1 teaspoon
brown mustard seeds
1 teaspoon
cumin seeds
1/2 teaspoon
hing (asafetida)
4
fresh curry leaves
1 teaspoon
ground turmeric
1/2 teaspoon
Kashmiri or other red chile powder
1-inch pieces
fresh ginger, peeled with a spoon and finely chopped
2
garlic cloves, minced
1/2 cup
lightly packed finely chopped fresh cilantro leaves
2 teaspoons
chaat masala
1 cup
chickpea flour (besan)
1 teaspoon
ground coriander
1 tablespoon
unsalted butter
4
flaky white buns, such as potato or brioche buns