In a large saucepan, beat together eggs, sugar and salt, if desired. Stir in 2 cups of Lifeway Lowfat Plain Kefir.
Cook over low heat, stirring constantly, until the mixture reaches 160 degrees. Remove from heat. Stir in an additional 2 cups of kefir and 1 teaspoon of vanilla.
Cover and refrigerate until thoroughly chilled, several hours or overnight. Just before serving, pour into a pitcher. Garnish with cinnamon sticks or a sprinkling of ground nutmeg and serve immediately.