I've been cooking family dinner meals for 25+ years and have never roasted veggies as a side dish. I've cooked them with meat for a pot roast but this is different.
Gather up fresh veggies and slice them small. Any veggies you like. Put in a casserole dish stacked. Coat with Olive oil, add tosemary, salt, garlic, pepper.. Bake at 425 degrees for at least one hour.