Begin by preheating your oven to 425°F. Prepare a baking sheet by lining it with parchment paper for an easier clean-up afterward.
In a large mixing bowl, combine the carrots with olive oil, kosher salt, and freshly ground black pepper. Toss until the carrots are evenly coated with the oil and seasoning.
Spread the carrots out in a single layer on the prepared baking sheet. This ensures they roast evenly.
Place the baking sheet in the preheated oven. Roast the carrots for 18-20 minutes if you’re using baby or garden-fresh carrots, or 25-30 minutes for larger store-bought varieties. Check for tenderness by piercing them with a fork.
Once done, remove the carrots from the oven and serve them warm. Garnish with chopped parsley, if you like, for a touch of freshness.