Melt the butter in a large and deep sauce pan.Add pitted prunes, pitted dates, cranberries, raisins, celery, and onion. Toss on medium to low heat until everything is heated, about five to six minutes. Use a large and flat spatula to toss gently so you don't smash the fruits . Add rice, saffron, a pinch of salt and teaspoon of pepper. Toss by picking up a spatula full of mixture and turn it over until everything is mixed, but don't mix so much that your fruit is mushy and your rice is not recognizable. Serve as side dish to any meat, fish or chicken. Serve instead of bread crumb stuffing at Christmas and thanksgiving.