Frozen Banana Daiquiri

Bruleed Banana
2 Sprinkle brown sugar on the banana.
3 Using a torch, brulee it until the sugar is melted and bubbling and the banana has caramelized a little.
12 Cut into chunks and freeze.
Daiquiri
8 Combine frozen banana slices and remaining ingredients except the dark rum and Angostura bitters in a blender. 
9 Blend at low speed for a few seconds then high speed until smooth.
10 Pour into garnished glass.
11  Finish with a float of dark rum and some Angostura bitters, if desired.