Steps
1. Preheat the oven to 400°F (200°C).
2. In a large baking sheet, toss the broccoli florets, sliced carrots, sliced onions, and cherry tomatoes with olive oil, salt, and pepper.
3. Spread the vegetables evenly on the baking sheet.
4. Roast in the preheated oven for 20-25 minutes, or until the vegetables are tender and slightly browned.
5. Remove from the oven and let cool for a few minutes before serving.