Place carrots in an even layer on a rimmed baking sheet. Drizzle olive oil all over then sprinkle garlic powder, salt, and pepper. Using your hands, rub and toss the carrots to make sure they're coated well.
Before placing in the oven, grate fresh parmesan cheese on top of the carrots (as much or as little as you like) then bake for 30 minutes or until carrots are fork tender. Make sure to shake the pan halfway through and toss the carrots.