Make the bread according to the instructions found on the package. Let the bread stand in a cool, dry place for a day or two. A half loaf will make approximately 4 cups of cubes. Cut the bread into 1/2 inch cubes. Place the cubes on a baking sheet and dry in a pre-heated 325 degree oven for 20 minutes. Remove and let stand. Melt the butter in a saute pan. Add the onion and celery and cook until soft. Add the broth and bring to a boil. Remove from heat and add the bread cubes, parsley, thyme, and sage. Combine throughly. Stuffing should be moist but not mushy.