I love this recipe. I was going to post it myself but saw that you beat me to it. I made it again last night, but this time used only oil spray to cut back on fat, and lots and lots of garlic. Yummm. Thanks for posting!
I used thousand island dressing, soy swiss cheese, and very dark pumpernickel. Yummmm!
Sharon - this was really good. I think I'm becoming a portabello mushroom junkie! I followed the dressing recipe exactly except for using white wine vinegar b/c I didn't have cider vinegar. The dressing had a wonderfully unique flavor! I added more than a dash of tobasco because we like that extra kick. This is definitely a keeper!