What is the name of a dish where meat is doused with brandy and lit on fire?
Steak Diane 

I first had Steak Diane at the Brown Palace in Denver long ago. I have made it several times and found the brandy flavor is overwhelmed by the other flavors. 

If you want the liquor flavor, I have found a smoked or grilled Bourbon Chicken on Food TV that has a lot of flavor. The chicken is brined overnight in soy sauce  brown sugar and bourbon, etc. but doesn't include flambe. Chicken might not be festive enough for your anniversary, though, but congratulations.