We roast a lot and grill if possible. All I use is olive oil (spray or drizzle), kosher salt, and any spices that might go with the meal.
This is what got me started on roasting... lol... yes, pioneer woman. Now, when I roast veggies, my kids ask for more helpings of veggies. (the only other time they do that is if it is carrots from a stew).
http://thepioneerwoman.com/cooking/2...ted-asparagus/