In a medium skillet, toast the paprika over moderate heat until fragrant, about 30 seconds. Scrape the paprika into a bowl. Add the cumin and mustard seeds, the peppercorns and cinnamon to the skillet and toast until fragrant, 1 minute. Transfer the spices to a spice grinder, let cool, then grind to a powder. Stir the powder into the paprika with the salt.