Boston Side Car Cocktail

We arrived at the Beau Rivage Resort in Biloxi this evening on our way to Ocean Springs, MS.  We asked the bartender to make our cocktail for today, a 'Boston Sidecar Cocktail'  (We had found this in our Bartender's guide this morning before leaving home.)
After consulting a reference app, the bartender made the drink and it was delicious!

The recipe in the Bartender's guide (I don't have the page no. with me):

3/4 oz Brandy
3/4 oz Rum
3/4 oz Triple Sec
juice of 1/2 lime

Shake with ice and strain into cocktail glass (I like the way he strained the drink; he separated the top and bottom and used the gap as the strainer). The garnish was an orange slice.

Don't know exactly if he followed this recipe - but it was good.

Cheers.