1 tablespoon (1/2 ounce) black strap rum (optional)
Garnishes: fresh pineapple wedges, fresh mint Sprigs
Combine first 6 ingredients in a blender, cover with lid, and process until smooth. Pour into 2 Collins glasses. Top off each with additional 1 1/2 teaspoons (1/4 ounce) black strap rum, if desired. Garnish, if desired.