1 ounce Southern Comfort liqueur
1 slim orange wedge
A dash of Angostura bitters
Sparkling wine / Champagne (well-chilled)
Pour the liqueur and bitters into a champagne flute. Stir. Top off the glass with Sparkling wine. Squeeze a bit of the juice from the orange wedge into the drink then add the wedge to the glass. Serve immediately.