Wash, and peel the potatoes. Cut them into 1 inch slices. Place them into a large skillet. Add sugar and water over and bring it to the boil. Turn the heat down to low and and cook it until potatoes are soft and syrup gets thicker. Remove it from the heat and let it cool for 20 minutes. Take 2 pieces ta a plate and add 2 tbsp of syrup on top. Decorate it with tahini and walnut or whatever topping you like.