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Yuzu is a Japanese citrus fruit with a lumpy, yellow-green rind outside and an addictive sour flavor inside. If you can't find bottled yuzu juice, you can substitute 3 tbsp fresh lime juice mixed with 1/2 tbsp fresh orange juice.
1/2 oz yuzu juice
1/2 oz simple syrup
1 slice of jalapeño
Muddle the jalapeño and simple syrup in a shaker. (Tip: the more you muddle, the spicier the drink!)
Add all other ingredients.
Shake and double strain into a rocks glass over fresh ice.
Garnish with a lime and jalapeño slice.