1. Dry roast the coriander seeds, cumin seeds, fenugreek seeds, mustard seeds, and black peppercorns in a pan over medium heat for about 5 minutes, until fragrant.
2. Let the roasted spices cool completely.
3. Grind the roasted spices into a fine powder using a spice grinder.
4. Mix in the turmeric powder and red chili powder.
5. Store the curry powder in an airtight container.