Preheat oven to 400 degrees. Line a baking sheet with parchment paper.
Place carrots on baking sheet. Combine butter, garlic and pepper and drizzle on carrots.
Roast for 20 minutes. Sprinkle cheese on top and roast 5 more minutes. If you want to crisp the cheese up some, broil for a minute or two.
If desired, season with salt. The Parmesan cheese will add some salty flavor so it may not be necessary.
If desired, sprinkle with parsley. Serve.