Sri Lankan Dark Roasted Curry Powder

Name: Sri Lankan Dark Roasted Curry Powder
Prep time: 15 min
Cook time: 1 h
Total time: 1 h 15 min
Cuisine: Asian
Ingredients: 3 tbsp cumin seeds; 4 tbsp coriander seeds; 1 tbsp fennel seeds; 1 tsp fenugreek seeds; 1 tbsp basmati rice (optional); 20 dried red chillies, or to taste (optional); 2 tbsp black peppercorns; 1 tsp black mustard seeds; 10 cloves; 2 x 2.5cm (1 inch) cinnamon sticks; Seeds from 8 green cardamom pods