Line a sieve with cheesecloth and set it over a bowl. (Alternatively, use a coffee filter lined with filter paper.) Spoon in yogurt and let it drain in the refrigerator until slightly thickened, about 30 to 60 minutes.
Whip cream in a chilled small mixing bowl with a whisk or electric mixer to soft peaks. Add the drained yogurt, sugar, ginger and rum, if using; fold gently to mix. Serve immediately or refrigerate, covered, for up to 8 hours.
1/2 other carbohydrate