Grapefruit-Banana Brûlée Tart

The combination of the tart grapefruit and the sweet banana in this recipe is very intriguing. I’m a great fan of grapefruit and think we don’t use them nearly enough. This tart needs to be started well ahead of serving—the dough needs to be chilled before rolling, then frozen before filling, and the filling should chill several hours before going under the broiler or torch. The final step (caramelizing the sugar) takes just a few seconds. For a really simple grapefruit dessert, try putting