
Preheat the oven to 425 degrees F (218 degrees C). Line an extra-large baking sheet with foil, if desired.
Combine the vegetables in a large bowl.
In a small bowl, whisk together the olive oil, balsamic vinegar, garlic powder, Italian seasoning, sea salt, and black pepper. Pour the mixture over the vegetables.
Arrange the vegetables in a single layer on the prepared baking sheet, making sure each piece is touching the pan. Do not overcrowd the pan - use multiple pans if needed.
Roast the vegetables in the oven for about 30 minutes, until they are golden brown.