Place 6-8 fresh mint leaves and a small splash of lime juice into the bottom of a tall glass. Gently muddle to release the mint oils without shredding the leaves.

Pour the mango puree, remaining fresh lime juice, simple syrup, and white rum into the glass over the muddled mint.

Fill the glass three-quarters full with finely crushed ice.

Insert a swizzle stick or long bar spoon. Hold the handle between your palms and vigorously spin back and forth for 10-15 seconds while moving up and down, until the outside of the glass is frosty.

Top the glass with more crushed ice to form a small mound or dome at the rim.

Generously dash the aromatic bitters over the top of the ice dome to create a bright red layer.

Garnish with a fresh mint sprig, thin slices of mango, a lime wheel, and an edible flower. Serve immediately with a straw.