Casablanca

Champagne Cocktail 

1 Sugar cube

4 heavy dashes Angostura Bitters

Champagne 

Lemon twist

Place sugar cube in coupe, saturate with bitters. Top with Champagne and lemon twist

For this cocktail, we have found that cheap sparkling wine works just fine. In fact, its how we make really bad stuff drinkable! 

And yeah, I know the pic isn't the exact moment, Renault orders the drinks but you go with what you have right now...