Dice all of your vegetables up. Feel free to add or subtract whatever veggies you would like. For example, I also really enjoy adding in mushrooms, asparagus, and green beans.
Toss veggies in olive oil and seasonings of choice (salt, pepper, garlic, parmesan cheese. For a Mexican option try cumin and chilli powder)
Preheat roasting pan in 450 F oven for 10 minutes
Put veggies in single layer on roasting pan.
Bake for 30-45 minutes, stirring frequently, until veggies are tender, and edges are browned.