Toast the cumin and coriander seeds, then grind into powder.
Combine bread crumbs and walnuts in the food processor and chop. Add everything but the oil and process into a thick paste.
With the processor running, slowly drizzle in the oil until the paste is fairly smooth with a bit of texture.
Spread into the bowl and drizzle with a bit more oil.
Serve at room temperature or chilled, with pita bread, crackers, or raw vegetables.