Slice, cut, or dice all of the veggies. Place them in a 9x9 baking pan, spray coated. Cover with aluminum foil, and bake for about 10-15 minutes or until the potatoes are done. Usually, I like to grill corn in the oven to go with this dish which also takes about 10-15 minutes. To grill the corn: Fold down the layers of the corn husks without breaking them, peel off the silks, and replace the husks. Then place directly on the grill of the oven.