Preheat your oven to 425°F (220°C).
Wash and prepare all vegetables by cutting them into even pieces.
In a large bowl, combine the vegetables.
Drizzle olive oil over the vegetables.
Add salt, pepper, and dried oregano.
Toss the vegetables until they are evenly coated.
Spread the vegetables in a single layer on a baking sheet.
Roast in the oven for 30-35 minutes, stirring halfway through.
Check for tenderness and caramelization.
Remove from the oven and let cool slightly before serving.