Wash the strawberries. Then remove the green and halve or quarter the strawberries (depending on size) and place in a tall container or in the blender.
Add the milk, the yoghurt, 1 tablespoon sugar and the vanilla extract and puree finely. Depending on the taste or sweetness of the strawberries, add a little more sugar.
Wash the limes and cut them into slices. Serve the smoothie in a glass with 2-3 slices of lime. It is also advisable to add 2-3 ice cubes.