Peel the lemon and finely chop the peel. Boil it for approx. 2 minutes in water. Put rice and olive oil in a pan and fry the rice in it for a minute. Add white wine and a bit of the water and cook the risotto for approx. 20 minutes on low heat while you continuously stir.
In the meantime, caramelize sugar in a pan. Add lemon juice, zest, butter and parmesan and combine. Take off the heat and set aside.
Season the risotto with salt and pepper. Turn off the heat and add the caramel to it once it's ready.
Tipps
If you boil the lemon zest for a few minutes before making the caramel, it will loose the harsh bitterness.