3⁄4 oz Lemon juice
3⁄4 oz Lemon syrup (Mix juiced, chopped lemon shells with sugar and allow to macerate, stirring every 45 minutes, until sugar is dissolved, ~3h.)
1⁄2 t Vanilla extract
3⁄4 oz Egg white (or the same amount of aquafaba)
Combine gin, lemon, syrup, vanilla, and egg white/aquafaba and shake with ice. Strain back into shaker and then dry shake for 30 seconds. Strain into a chilled coupe and garnish with several drops of lavender bitters.