I have been making this for years. Co workers have literally begged me to make this for them instead of sweets. I usually use a mixture of button and baby portabellos, but the exotic mix is good to throw in as well. Make it fancy for a pot luck....toss it with the noodles in a casserole and top with garlic buttered breadcrumbs and bake until they are golden. Looks like you fussed for hours! You could substitute vegetable broth to make it vegetarian.