Published September 1, 2011. From Cook's Illustrated.
For a full-bodied, complex sauce to accompany our gnocchi recipe, we found that a porcini mushroom sauce recipe fit the bill perfectly--and took just minutes to make. We reconstituted the mushrooms by microwaving them and chicken broth, and then letting them stand for a few minutes. This also created a mushroom broth that boosted our sauce's flavor when we added it later.