Add all the ingredients to a shaker filled with ice and shake.
Strain into a chilled coupe.
Top a lemon slice with red chile threads, and use it to garnish the drink.
*Meyer lemon syrup: Peel 6 Meyer lemons. Use a paring knife to get rid of any remaining white spots on the peels. Blanch them three times in boiling water, then simmer in 1/2 L water and 1/2 L sugar for 20 minutes. Cool before using.