Wash the radish thoroughly, peel it, and slice it into 1cm thick rounds.
Heat olive oil in a pan over medium heat and grill the radish slices on both sides until golden brown.
Season the grilled radish with salt and pepper.
Melt sugar and butter in a small pan to make caramel.
Pour the caramel evenly over the radish slices.
Bake the radish in the oven at 180°C for an additional 10 minutes.
Cool the finished radish canelé and plate it.