expatgirl
Master Chef
When you're adventuresome do try some roasted eggplant that has been peeled and sliced---delicious with a medley of veggies. If they're the baby eggplant you don't have to slice them at all unless you want to.
Diane - if I understand that what you are wanting to do is simply roast veggies in the overn ... it doesn't matter! Cut your veggies - toss in a bowl, drizzle with oil, add S&P and herbs as you wish, toss with your hands to coat well - pour out onto a baking sheet/pan in a single layer (lined with something or not is your choice) - and stick it in oven to "roast".
The only difference between roasting and baking in this instance is that the veggies are coated with oil - that makes it officially roasting, without the oil it would be baking. The oil promotes browning that you would not get without the oil. It's a Maillard Browning Reaction that creates flavors that would not otherwise be available.
I've used 9x13x2 inch roasting pans (metal and Corningware) - and just plain old aluminum sheet pans (these are what I use) - no big difference.
Lining the pan with parchment paper or aluminum foil will only make a difference in cleanup - it does not affect cooking.