Add all stewed prune ingredients to a small pot. Bring to a boil and then simmer on a low boil, uncovered, for 20 minutes. Continue to simmer, covered, for 10 more minutes.
Fill two bowls with ½ cup of yogurt each. Make a well in the yogurt and then add prunes and syrup. Sprinkle cinnamon on top. Add half lemon slice from prunes for garnish.