In a small jar, mix kefir, chia seeds, vanilla, and honey until fully combined.
Cover and refrigerate for at least 4 hours or overnight. If the chia seeds are not evenly distributed after about an hour of setting, give them a quick stir.
Top with fresh berries.
Notes
Texture: The pudding will be thick and spoonable. If it's too thick, stir in a splash of kefir or milk. If too thin, add some more chia seeds and chill for another 30 to 60 minutes.