Place all ingredients in a bowl and mix until smooth. Transfer the mixture to a plastic sandwich bag and cut a small hole in the corner. Lay out the cucumber circles and squeeze a bit of the mixture onto each cucumber. Arrange them on a serving platter and serve.
*What is Kefir?
Traditionally made by draining whey from slightly salted yogurt, kefir is a thick & creamy yogurt cheese and a healthier alternative to regular cream cheese. It is also rich enough to be used as a substitute for sour cream.