How to Make It
Put the radishes in a medium saucepan and add 1 teaspoon of salt, the sugar, oil and water. Bring to a boil over high heat, then lower the heat to moderate, cover and simmer until the radishes are tender, about 12 minutes.
Using a slotted spoon, transfer the radishes to a serving bowl. Boil the cooking liquid over high heat until reduced to 1/4 cup, about 15 minutes. Season with salt and pour the liquid over the radishes.