Peel garlic and chop very finely. Wash the lemon thoroughly, grate dry and peel the peel with a zest ripper. Halve the lemon and squeeze it. Prepare pasta in boiling salted water according to package instructions.
Meanwhile, drain the Parma ham in a pan without fat, remove it and let it drain on kitchen paper. Heat the oil in the pan. Sauté the garlic and lemon julienne briefly. Add butter and melt.
Add 3 tablespoons of lemon juice, heat and season with salt, pepper and sugar. Pour the pasta into a sieve, rinse and drain. Add the noodles to the oil, mix and heat. Wash parsley, shake dry, pluck off some leaves, cut remaining parsley into fine strips.
Mix into the noodles. Arrange noodles on plates. Crumble Parma ham over the pasta and sprinkle with Parmesan cheese.