Passion Fruit Sour
Luxardo cherry or passion fruit slice
1/12 - 2 oz white rum
3/4 oz lime juice
1/2 oz passion fruit syrup
1/2 oz simple syrup
1/2 oz egg white

Add all to shaker of ice. Shake vigorously to froth egg whites. Strain into a coupe or rocks glass with or w/o ice.
I used a rocks glass with a large ice ball. Sip and think "My God, it tastes like there is no alcohol in this. It's dangerously delicious ".
[['4.5 cl', 'White (charcoal-filtered) 1-3 year old light rum'], ['1.5 cl', 'Lime juice (freshly squeezed)'], ['1.5 cl', 'Sugar syrup (65.0°brix, 2 sugar to 1 water rich syrup)'], ['1.5 cl', 'Passion fruit syrup'], ['1.5 cl', 'Egg white']]
[['4.5 cl', 'white rum'], ['1.5 cl', 'lime juice'], ['1.5 cl', 'sugar syrup'], ['1.5 cl', 'passion fruit syrup'], ['1.5 cl', 'egg white']]