Fill a blender halfway with ice cubes. Scoop out flesh from dragon fruit half and place in the blender. Add cream of coconut, rum, coconut milk, and pineapple chunks; puree until smooth. Pour into 2 glasses.
When selecting a dragon fruit, feel the stem. It should bend without breaking when you touch it. If it is brittle, move on. The fruit should feel slightly spongy, almost like a kiwi. If it is very firm, leave it for a day or two and check again. The skin should be a bright pink color. Chilling it brings out the flavor.
Per Serving: 503 calories;19.4 g fat;
53.8 g carbohydrates;
0.9 g protein;
0 mg cholesterol;
47 mg sodium.