Preheat your oven to 425°F (220°C).
Wash and cut the vegetables into evenly sized pieces.
Place the chopped vegetables in a large bowl.
Drizzle olive oil over the vegetables.
Sprinkle garlic powder, oregano, salt, and pepper.
Toss the vegetables until they are well coated in oil and seasoning.
Spread the vegetables onto a baking sheet in a single layer.
Roast in the preheated oven for 25-30 minutes, stirring halfway through.
Check for tenderness and desired browning.
Remove from the oven and let cool slightly before serving.