Lightly MUDDLE mint and basil in glass just enough to bruise. Add rum, sugar and lime juice. Half fill glass with crushed ice and CHURN (stir) with bar spoon. Add more crushed ice and CHURN some more. Continue adding crushed ice and churning until glass is full.
Basically a Mojito with basil as well as mint.
Discovered in 2004 at Excelsior Bar, Boston, USA.