Mom’s Collins

1 oz Paula’s Texas Lemon
¾ oz fresh lemon juice
8 sprig fresh parsley
1½ oz gin
1 oz well-chilled club soda

Parsley bolting? Try using it in this variation on a Tom Collins. (We let our parsley go to the black swallowtail caterpillars because they are so pretty.) This is a fairly dry drink; if you want sweeter, use tonic water instead of club soda. In a mixing glass, muddle parsley with Paula’s Texas Lemon and lemon juice. Add gin and ice and shake well. Strain into Collins glass filled with ice (double strain through a tea strainer if you don’t want green bits). Add club soda and stir. Garnish with parsley sprigs.

Similar
White Lady (-parsley, club soda), Austin Daisy (+lemonade; -parsley, club soda), Southside (+mint; -parsley), The GTL (-lemon juice, parsley), Corpse Reviver No. 2 (+Lillet Blanc; -parsley, club soda), Water Lily (+Crème de Violette; -parsley, club soda), Gin Fizz (+syrup; -citrus liqueur, parsley)
Source
http://pts.nwalsh.com/newsletters/May2009.htm