I was reading about spices the other day, and saffron came up as being one of the most expensive ingredients. Its because you don't get a lot of seeds from the plant, and essentially that's what spices like saffron are. The seeds of a plant.this a regular rissito i made, and i've only used the ingredient once. It turns your food into a nice bright yellow, and it gives the dish a bit of a lively zing taste. Would be greatly enhanced by earthy mushrooms.