Preparation Place pineapple pieces in large jar. Pour Pisco over. Cover and refrigerate 3 days, shaking occasionally. Divide Simple Syrup between 2 bowls. Mix grated lime peel into 1 bowl and grated grapefruit peel into the other. Cover and refrigerate both syrups overnight. Strain Pisco into pitcher; discard pineapple. Strain both syrups into Pisco. Add lemon juice; stir to blend. Fill 12 small glasses with ice, then add punch. Garnish with pineapple leaves, if desired.
Preparation Place pineapple pieces in large jar. Pour Pisco over. Cover and refrigerate 3 days, shaking occasionally. Divide Simple Syrup between 2 bowls. Mix grated lime peel into 1 bowl and grated grapefruit peel into the other. Cover and refrigerate both syrups overnight. Strain Pisco into pitcher; discard pineapple. Strain both syrups into Pisco. Add lemon juice; stir to blend. Fill 12 small glasses with ice, then add punch. Garnish with pineapple leaves, if desired.