Roast first four ingredients in a dry pan over low heat until golden.
Add coriander and fenugreek seed, continuing to toast until coriander is lightly roasted and fenugreek seeds are beginning to darken.
Add curry leaves and toast, stirring, until crisp.
Add cumin and roast, stirring, until crunchy. Remove pan from heat and let cool completely.
Grind all ingredients to a fine powder.