1/2 cup white sugar 2 teaspoons piri-piri sauce, preferrably Mázi Piri Piri 1/2 oz. fresh lime juice 1 1/2 oz. white tequila, such as Siembra Azul Tequila Blanco 3/4 cups fresh pineapple, cut into 1-inch chunks and frozen 1 piece unsweetened dried pineapple for garnish
Make the piri syrup: Dissolve the sugar in 1/2 cup boiling water; add piri-piri. Stir well to combine. Pour piri syrup into a clean, lidded container; chill.
Shake chilled piri syrup to mix well. In a cocktail shaker, combine 1 oz. piri syrup, lime juice, and tequila. Fill the shaker halfway with ice. Add frozen pineapple. Shake well.
Pour into double rocks glass; garnish with dried pineapple.