People don't usually think of radishes as a roasting possibility - but they are great. The colour goes a beautiful pale rose pink and the combination of juicy red onions, the roast radishes and the sweet balsamic dressing is just fabulous and so simple to achieve.
Toss the radishes and onion wedges in olive oil and sprinkle with salt. Roast in a hot oven (200°C) for approximately 35-40 minutes, stirring a couple of times until the onions are crispy and the radishes fairly tender when tested with a sharp knife tip.
Sprinkle over the balsamic vinegar and toss to coat well. Serve as a side dish or as a vegetable dish along side roast meat. This looks spectacular presented as a big platter.