Preheat the oven to 350°. In a medium skillet, combine the coriander, cumin, mustard and cardamom seeds and the cinnamon. Toast the spices over low heat until fragrant and starting to brown, about 1 minute. Transfer to a plate and let cool, then grind to a powder in a mortar or spice mill. Put the powder in a small bowl and stir in the turmeric and cayenne.