If you don’t have Italicus, you could use limoncello as a substitute – it doesn’t have quite the same profile, though. The first dry shake (ie, without any ice) isn’t 100% necessary, but it does give the best results.
Inmigrante
30ml joven (young) mezcal – we use Ojo de Dios
20ml Aperol
10ml Italicus Rosolio di Bergamotto, or limoncello at a push
10ml vanilla syrup (homemade or bought in)
20ml fresh lime juice
3 dashes Ms Better’s Miraculous Foamer, or 1 egg white, or 25ml aquafaba
1 sprig rosemary, or 1 edible flower, to garnish
Measure all the liquids into a shaker, dry shake for 10 seconds, then add a big handful of ice and shake hard for 10-15 seconds, to chill and aerate the drink. Double-strain into a chilled nick & nora or martini glass, garnish with a sprig of rosemary (or an edible flower) and serve.