Wash and peel the potatoes, cut into 3 cm thick cubes.
Wash the cabbage leaves, cut off the stalk end and cut into strips of about 1 cm wide.
Heat the oil in a saucepan and fry the onion till soft. Add the garlic, caraway seeds and the potato pieces. Stir for a few minutes, then pour in enough water to cover.
Add bay leaf and season to taste.
When the potato is half-cooked, add the cabbage strips and simmer under cover for about 15 minutes.
Most of the potatoes should be well cooked by now and broken up. Using a fork, or hand blender, mash some of the potatoes until the soup is thick but still chunky.
Remove the bay leaf and serve with Sour cream or Greek yoghurt.