@bhawthorne I'm not sure this a question with a 'right' answer as (looking at the answers I see) you can use a higher temperature and cook them for less time.

So my top result (bbc.co.uk) says pre-heat to 200°C and roast for 5 minutes while most (presumably US) suggest 350°F (175-180°C) and about 10 minutes.
Or you can lower the temperature and cook for longer.