I second the vote for bananas foster.
The secret is to flame it; I've used meyers's dark rum to some effect. Melt a half stick of unsalted butter, and some brown sugar (white will work if you don't have brown) and some cinnamon. Not too high though 🙂 Put in your bananas, don't took for too long especially if they're ripe; thirty seconds should be fine. Coat 'em with your sauce . . . take the pan off the heat, pour in a couple shots worth of rum, tilt it so your liquid goodness collected on an edge of the pan, turn the stove heat up to full blast, and put your pan edge with the liquid over it. In a couple seconds, it'll get all flamey on you (turn off the lights; it looks cool) and stir it gently (just move the pan) until you've reduced off the alcohol. Serve with ice cream if you have it and enjoy.
I suppose you could do this without the rum, but what's the fun 🙂
Also, the brennan's (sp) recipe doesn't call for butter; i think they use banana liqueur.