The most important ingredients at a glance.
Cut the peel off of some of the lemons and finely grate the Parmesan cheese.
Bring the water to the boil. Add lemon peel and juice to the pot, cover with the lid and let them steep for approx. 1-2 hrs.
In a large pan, add half of the lemon water, olive oil and salt. Bring to the boil over medium high heat. Once the water is boiling, add the spaghetti and cook them until al dente. If necessary, add some of the remaining liquid. Remove the pasta from the heat and mix in the cheese, some lemon zest and pepper, until you reach a creamy consistency.
Plate your pasta and enjoy!