2 parts gin
1 pt fresh lime juice
1 pt Aperol
½ pt honey syrup
2 dashes of Angostura bitters per cocktail (if pt=oz, 4 dashes)
Champagne or sparkling wine
lime wheel for garnish

Combine gin, lime juice, Aperol, honey syrup, and bitters in a cocktail shaker with ice. Cover and shake until outside of shaker is frosty, about 30 seconds. Strain into chilled coupe glasses. Top off each with Champagne and garnish with a lime wheel.

Via http://www.bonappetit.com/recipe/saint-florent-cocktail