Spicy and sweet — a perfect blend for Valentine's.
Muddle the jalapeño and cilantro in the bottom of a cocktail shaker. Add honey syrup, tequila, lime juice, pineapple juice, and honey syrup. Fill shaker partway with ice and shake until well integrated and cold. Strain into a chilled cocktail glass and top with seltzer. Serve straight up, garnish with a floating slice of jalapeño.