Preheat oven to 400 F.
Cut radishes into halves or quarters.
On a baking sheet, toss radishes with olive oil and a pinch of salt and spread them out. Roast them face down to brown nicely.
Roast in the oven they are tender. This might take 15-30 minutes depending on the size of your radishes. Toss them once or twice during that time.