This is my absolute favorite grill cookin' recipe. Back in the apartment days we had some neighbors that we got together with frequently for dinner and cards (oh the memories). Anyway, Stacy would always whip up something tasty on the grill. One time in particular she made these potatoes and they were AWESOME! Every year when grill season rolls around (since I have to wait for grill season-being that I don't live in the land of eternal summer) these are a definite fave! I have been making them for years and I finally have the recipe tweaked to perfection:)
Start layering the veggies. I usually do a layer of peppers and onions and top them with a layer of potatoes and then sprinkle a few mushrooms on top of that.