How to Make It
Process banana, sugar, 1 1/2 cups hot water, and curry powder in a blender until smooth and sugar is dissolved, about 1 minute and 30 seconds. Pour mixture through a cheesecloth-lined fine wire-mesh strainer into a bowl; discard solids. (You will have about 11/2 cups curry-banana cordial.) Chill cordial until cold, about 45 minutes. Store in an airtight container in refrigerator up to 1 week.
To make 2 drinks, combine crushed ice, rum, lime juice, and 6 tablespoons curry-banana cordial in a blender. Process until smooth, about 30 seconds; pour into 2 stemmed glasses, and garnish with banana chips or plantain chips. Serve immediately with straws.