Wash the beetroot and the leaves. Cut the beets, then slice the leaves into finger size pieces. In a bog pot put water to boil.
Add the beets when the water is still cold and only when it's boiling also the leaves.
We boil vegetables by this rule: everything that's in the ground we add in the cold water and everything above the ground - to be added only when the water boils.
Boil for about 50 minutes or until the beets are boiled. Rinse.
Using gloves clean the beets on a fork, or if they are cold just peel them by hand. Cut the beets into slices or cubes and mix them the boiled leaves, the vinegar, the oil and some salt.
Serve cold, with feta and garlic.
Greeks eat a lot of boiled healthy leaves and this here is another example of such a recipe. Enjoy!