Get a sauté pan hot and sprinkle with tablespoons sugar over the pan. Cook until the sugar melts and starts to caramelize. Place the banana slices over the melted caramel and turn down the heat, and cook the bananas for 30 seconds.
Pour 3 tablespoons of rum, bourbon or calvados over the bananas and carefully flambé. Cook another 30 seconds, flipping them over once.