Preheat your oven to 425°F and line a large baking sheet with parchment paper for easy cleanup. This high temperature is crucial for achieving those beautiful caramelized edges on the vegetables.

In a large bowl, combine all chopped vegetables including broccoli, bell peppers, zucchini, red onion, and cherry tomatoes. Drizzle with olive oil and toss gently until everything is evenly coated.

Sprinkle garlic powder, paprika, dried Italian herbs, salt, and black pepper over the vegetables while tossing. Make sure the seasoning distributes evenly so every bite tastes flavorful and consistent.

Spread the vegetables in a single layer on your prepared sheet pan, leaving a little space between pieces. Roast for 18–20 minutes until edges are charred and vegetables are tender-crisp, stirring halfway through cooking.

Remove the sheet pan veggie dinner from the oven and immediately drizzle with balsamic vinegar for brightness. Sprinkle fresh basil and Parmesan cheese over the warm vegetables while they're still steaming.

Let it cool for 2 minutes before serving, allowing flavors to meld together beautifully. The residual heat will finish cooking delicate herbs without making them bitter.