Sorry if are posting t too many roasting dishes. We are in an apartment that finally has a decent oven. We positioned a powerful exhaust fan in the window that keeps the kitchen bearable even in the summer. So this was a savory idea that came to mind while walking past the mushrooms at Whole Foods. Using a basic marinade of cold pressed extra virgin olive oil, sea salt and white pepper.
Use about 3 Tablespoons of oil, and the rest - you have to do it to taste. Throw all that in the biggest bowl you've got.
Toss in 15 sliced Shiitake mushrooms, shoestring or Julienne strips (thin ones - I used a knife, not a mandoline or machine) of 5 golden potatoes, 1 sliced sweet onion and a handful of chopped parsley.
Take a big spoon and swirl all the veggies around until they're coated. Mound it up and bake it on a sheetpan @ 400 for 20 mins. More if you like it toasty.