Preheat the oven on 210 degrees Celsius or 430 degrees Fahrenheit.
Clean the carrots, for the roast, and cut them in half. This will reduce the cooking time a bit. Toss the carrots with some olive oil and pepper and place them in an oven dish. You can also divide them on some baking paper on a baking tray. Cut the tangerine in half and sprinkle some juice on the carrots.
Roasting
Roast the carrots in the preheated oven for about 30 minutes, or until roasted. You can add a little bit of water if you want the carrots to cook quicker.
When the carrots are cooked, you can add the butter and ginger syrup to the oven dish. Toss around until the carrots are glossy. Finish with a few salt flakes and parsley.