Add all ingredients except bitters into a shaker and dry-shake (no ice) for 15-20 seconds.
Add ice and shake again for 10-15 seconds.
Strain into a coupe glass.
Add the bitters.
Garnish with a lemon tree leaf.
*Pistachio syrup: Add 4 oz whole pistachios (no shell), 1 oz chopped pistachios, 3 cups water and 1/2 cup sugar to a pot and bring to a boil. Turn off heat and let sit for 10 minutes. Strain out the nuts, add 2 cups sugar and stir until fully dissolved. Add 1/4 oz rose flower water, 1/4 oz orange blossom water and 2 oz cognac. Seal and refrigerate.