By Zuza Zak
Kefir, the drink of my childhood in Poland, is loved just as much by the people of the Baltics. Fortunately, it is now increasingly available, either plain or sweetened, and I like to use it as a base for a fruit smoothie, such as this invigorating berry one.
Whizz the cranberries to a fine powder in a powerful food processor or blender. Add the kefir, raspberries, birch or maple syrup and ice cubes and blitz to a smooth, pale pink shake.
Add the strawberries and pulse a few times, so you still have some fruity strawberry bits in your smoothie, then pour into glasses to serve.