Preheat the oven to 450ºF. Line a baking sheet with parchment paper or foil.
In a large bowl, combine the olive oil, balsamic vinegar, garlic, and seasonings. Add the carrots to the bowl, and toss to coat. (If your bowl has a lid - put it on & shake to coat quickly)
Pour the carrots out onto the lined baking sheet, arranging them flat.
Roast in the oven to 20 to 30 minutes, until tender and lightly browned.