2 orange wheels (1 for garnish)
2 lemon wheels (1 for garnish)
2 teaspoons superfine sugar, or 1/2 oz simple syrup
3 ounces dry Sherry (amontillado or mazanilla)
Mint sprig and raspberries for garnish
Muddle 1 orange wheel, 1 lemon wheel, and sugar or simple syrup in a pint glass. Add Sherry and pour into a cocktail shaker filled with ice. Cover; shake vigorously until outside is frosty, about 30 seconds.
Strain into a collins or highball glass filled with crushed ice. Add more crushed ice, packing into glass and mounding above rim. Garnish with mint, raspberry, orange wheel, and lemon wheel. Drink with a straw.