Preheat oven to 400 degrees Fahrenheit (200 degrees Celsius).
Line a large rimmed baking sheet with parchment paper to prevent adhesion.
Distribute the sliced chicken sausage, bell peppers, zucchini, and red onion across the prepared baking sheet.
Drizzle the components with extra virgin olive oil and apply the dried oregano, garlic powder, salt, and black pepper uniformly.
Toss the ingredients thoroughly to ensure even lipid and seasoning distribution, then arrange in a single layer to facilitate roasting.
Roast for 25 minutes, or until the vegetables reach desired tenderness and the sausage surfaces exhibit slight caramelization.
Remove from the oven and allow to rest for 2 minutes before serving.