1 1/2 oz of amontillado sherry (or dark sherry)
1 oz of Aperol
3 dash of orange bitters
1 1/2 oz of Prosecco (or Champagne)
1 oz of lemon peel
Fill a cocktail shaker with ice. Add the sherry, Aperol and 2 dashes of bitters and shake well. Strain into a chilled flute. Top with the Prosecco and garnish with a dash of bitters and the lemon twist.